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Laser Viewing Cards


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Laser Viewing Cards

Features

  • Detector Cards for UV, Visible, NIR, or MIR Wavelength Ranges
  • Detect Radiation as Low as 1 nW/cm2
  • Wavelength Range or Sensitivity Curve Printed on Card

Thorlabs offers a selection of detector cards for use with UV, Visible, Near IR (NIR), or Mid IR (MIR) radiation. These cards are fabricated from either plastic with a photosensitive region or metal with a liquid-crystal film. The card's light-sensitive detector area allows for the easy location of a UV, Visible, NIR, or MIR laser beam and its focal point. To facilitate their use during alignment procedures, the detection region of every card on this page except the VRC5 extends all the way to the edge of the card, all but the VRC5 feature two engraved reticles for use in laser beam collimation.

Please note that these detector cards are not intended to be used as laser beam blocks, and appropriate safety measures should be taken when working with laser beams. See the Laser Safety tab for details.

 

VRC6 Spot Imagesa
Power
Density
Detected
Spot Size
Spot Image on CardPower
Density
Detected
Spot Size
Spot Image on Card
0.3 W/cm2Ø0.5 mmDetected Spot on Card1.6 W/cm2Ø0.9 mmDetected Spot on Card
0.6 W/cm2Ø0.6 mmDetected Spot on Card2.0 W/cm2Ø1.0 mmDetected Spot on Card
0.9 W/cm2Ø0.7 mmDetected Spot on Card2.3 W/cm2Ø1.1 mmDetected Spot on Card
1.1 W/cm2Ø0.8 mmDetected Spot on Card2.6 W/cm2Ø1.1 mmDetected Spot on Card
1.4 W/cm2Ø0.9 mmDetected Spot on Card2.8 W/cm2Ø1.2 mmDetected Spot on Card
  • The actual size of the spot on the VRC6 MIR detector card under varying power densities can be seen in the table above. Please note no spot was detected when the power density was below 0.3 W/cm2. The ambient temperature of the lab was 23 °C.

VRC6
Click to Enlarge
The spot size on the VRC6 MIR detector card will vary depending on beam power. The graph above displays the results of a test done using a diode with a Ø0.78 mm spot size. The ambient temperature of the lab was 23 °C.

Laser Safety and Classification

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina. 

Alignment Tools
Laser Barriers
Enclosure Systems
Blackout Materials
Laser Glasses
Laser Viewing Cards
Laser Safety Signs
Shutter and Controllers

Safe Practices and Light Safety Accessories

  • Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
  • Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
  • Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
  • Laser Barriers and Blackout Materials can prevent direct or reflected light from leaving the experimental setup area.
  • Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards.
  • A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW.
  • All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use.
  • Do not place laser beams at eye level.
  • Carry out experiments on an optical table such that all laser beams travel horizontally.
  • Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.
  • Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.
  • Operate a laser at the minimum power necessary for any operation.
  • If possible, reduce the output power of a laser during alignment procedures.
  • Use beam shutters and filters to reduce the beam power.
  • Post appropriate warning signs or labels near laser setups or rooms.
  • Use laser sign lightboxes if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
  • Do not use Laser Viewing Cards in place of a proper Laser Barrier or Beam Trap.

 

Laser Classification

Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:

ClassDescriptionWarning Label
1This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser. Class 1
1MClass 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly. Class 1M
2Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm). Class 2
2MBecause of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams. Class 2M
3RLasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class. Class 3R
3BClass 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock. Class 3B
4This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock. Class 4
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign Warning Symbol
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Posted Comments:
Poster: egregorio
Posted Date: 2014-03-24 20:45:29.01
I have read in previous comments that the VRC4 has a minimum detectable power density for a pulsed laser of 250 kW/cm^2 peak @ 1064nm, 7ns, 10Hz. I have a pulsed laser at 1535 nm with 210 kW/cm^2 peak @ 1535 nm, 7 ns, 1 Hz, So, I am not sure if the VRC4 is sensitive enough. Do you know the sensitivity of this card for a pulsed laser at 1535 nm?
Poster: jlow
Posted Date: 2014-03-26 11:36:56.0
Response from Jeremy at Thorlabs: The absorption at 1535nm would be lower than that at 1064nm (see spectral sensitivity graph on the webpage) so the minimum detectable power would be higher. Therefore, the VRC4 would probably not work for you. The VRC2 would probably work better for you. The min. stimulation is around 2kW/cm^2 peak power @ 1064nm. Adjusting it to 1535nm would be around 10kW/cm^2 or so.
Poster: kedves
Posted Date: 2013-12-11 18:40:08.92
Dear Thorlabs, Can your NIR Detector Card VRC4 be used with Ti:Sapphire laser beams? The absorption band seems to be appropriate, but how about the peak/average power density thresholds in the femtosecond pulse range? Are there any data or experiences? Secondly, I suppose that the surface of the photosensitive region is non-reflecting, is it correct? Thanks.
Poster: tcohen
Posted Date: 2014-01-09 04:27:57.0
Response from Tim at Thorlabs: Thanks for your inquiry. The VRC4 has the appropriate absorption bands, but currently our data is only for CW and Pulsed: CW: Min <2uW/cm^2 at 808nm in dark. Min Pulsed: 250 kW/cm^2 peak @ 1064nm, 7ns, 10Hz, low ambient light. Max Pulsed: 35 MW/cm^2 peak @ 1064nm, 7ns, single pulse. Unfortunately this may not scale well to the fs regime. There is not a laminate over this coating but there will be some diffuse reflection. I’ve contacted you to organize some testing.
Poster: lunaysol77
Posted Date: 2013-11-28 13:33:51.477
Hello, I have a pulsed QCL in the range 6.71 to 8.73 microns with a maximum power of 300 mW, pulse width maximum of 500 ns, a pulse repetition rate of 100 KHz and a spot size of 2.5 mm. The VRC6-card serves to this laser?. Do you have any other recomendation to detect this laser? Thanks!!
Poster: jlow
Posted Date: 2013-12-02 02:44:05.0
Response from Jeremy at Thorlabs: The VRC6 can be used to view the output from your QCL.
Poster: Erik.Schmidt
Posted Date: 2013-11-13 17:53:53.273
Hello, is the flourescent material on the VCR4-Card also available as a foil or as a paintable coating? Thx for reply!
Poster: cdaly
Posted Date: 2013-11-14 04:01:26.0
Response from Chris at Thorlabs: Thank you for your inquiry, but unfortunately, we are not able to offer the viewing materials in this format.
Poster: hambitza
Posted Date: 2013-05-13 11:27:33.783
My laser runs at 1080 nm. Does the flourescence of the VRC4D1 for 870 nm - 1070 nm "cut off" at 1070 nm or will it show some signal also 10 nm away at 1080 nm?
Poster: jlow
Posted Date: 2013-05-15 11:13:00.0
Response from Jeremy at Thorlabs: The absorption does cut off at 1070nm. For 1080nm, I would recommend using the VRC2D1 instead.
Poster: doug.newman
Posted Date: 2013-05-08 12:26:07.12
Product is currently in use. May order more. Question: are there any power-density threshold studies that have been done to note the maximum power/heat the cards may withstand before being damaged? Obviously this question has been asked before; just wondering if there are any updates? Thank you. doug
Poster: jlow
Posted Date: 2013-05-14 09:27:00.0
Response from Jeremy at Thorlabs: We do not have the damage threshold spec at the moment. We are testing the damage threshold and we will update the webpage with the damage threshold spec once we are finished with the testing.
Poster: bowen
Posted Date: 2013-02-28 11:07:27.38
Which card should I use for a 660-680nm source (your diode SLD1332V)? Thanks!
Poster: cdaly
Posted Date: 2013-03-06 09:21:00.0
Response from Chris at Thorlabs: Thank you for using our web feedback. There's no card we recommend for this particular wavelength range. 660-680 nm is red light, which should be visible without the use of one of these. These are typically designed for use with UV or IR wavelengths. A few of these do have span wavelength in the visible, but these are always in addition to other non-visible ranges.
Poster: jlow
Posted Date: 2012-10-22 16:33:00.0
Response from Jeremy at Thorlabs: The guideline value for the damage threshold for VRC2 is 60MW/cm^2 (peak power, for Nd:YAG laser @ 1064nm - single 7ns pulse). Unfortunately we do not have a damage threshold spec for CW.
Poster: mlpgil
Posted Date: 2012-10-19 15:54:48.483
We need to use the VRC2 card, with a laser beam with 1064nm, and 30W of maximum power. We need to know what is the maximum power and energy density that could whitstands the VRC2 card. Thank you,
Poster: tcohen
Posted Date: 2012-03-29 11:12:00.0
Response from Tim at Thorlabs to Raffi: Thank you for your feedback! The VRC4 has a sharp cut on working range at 795nm whereas the VRC2 and VRC5 have some low absorption which is nonzero at 795nm. Therefore, at this wavelength it is difficult to see performance differences between the three. To clarify, we will update our website presentation to include graphs for future users to compare. If you have found that your VRC2/5 are working better for you and you have no need for the VRC4, we will fully refund your purchase.
Poster: raphael.cohen3
Posted Date: 2012-03-29 07:36:09.0
we use a 795nmn laser so we bought a VRC4, according to your graphs but it is not as effective as VRC2 & 5 that we have can you explain this? Thanks Raffi
Poster: bdada
Posted Date: 2011-10-18 14:19:00.0
Response from Buki at Thorlabs: Thank you for using our feedback tool. We will consider making the mounted version of the VRC4 available on our website. In the meantime, you could purchase the VRC4D1 alignment disk, which has the same wavelength band as the VRC4, and place it in a 1” mount like the LMR1 or a lens tube like the SM1L03. Please contact TechSupport@thorlabs.com if you have further questions.
Poster: cbrideau
Posted Date: 2011-10-13 23:01:15.0
Could I get something like the VRC2SM1 threaded alignment disk, but using the VRC4 detector material instead? I find the VRC4 much easier to work with since it doesn't require room light charging.
Poster: jjurado
Posted Date: 2011-03-23 13:54:00.0
Response from Javier at Thorlabs to dmitry_skvortsov: Thank you very much for contacting us with your request. For light detection at 1550 nm, we recommend using the VRC2 or VRC4 cards. I deem that the VRC4 would be the optimal solution for use at 1550 nm, since its absorption band is more pronounced than that of the VRC2. Also, the VRC4 requires no room light charging and the minimum incident power required is 100uw/cm^2 (@1550nm). We currently do not have the specification for the minimum power required for the VRC2. I will look into this and get back to you.
Poster: dmitry_skvortsov
Posted Date: 2011-03-17 18:42:44.0
Which card has the highest sensitivity for 1550nm? What is the minimum cw laser power density needed to view the spot?
Poster: Thorlabs
Posted Date: 2010-10-19 15:35:45.0
Response from Javier at Thorlabs to tkendall: The 830 nm output of your laser diode is close to one of the upper boundaries of the absorption bands of the VRC4, so the card is not very sensitive at this wavelength. We tested our IR viewing cards with an 830 nm laser diode, an the VRC4 actually requires a ~3.5 mW inout in order for one to be able to view the beam. On the other hand, the VRC2 and VRC4 clearly display the 830 nm beam at arounf 0.8 mW and 0.3 mW, respectively. So, I would recommend using the VRC5 card, although it is worth noting that this card needs to be constantly charged by room light. I will contact you directly in case you have additional questions.
Poster: tkendall
Posted Date: 2010-10-18 20:11:52.0
Just purchased a VRC4 detector card. It does not display the IR radiation. The application is viewing the output of a 0.5mW output 830nm IR laser. Apparently this low output cant be detected. Is there something wrong or was the wrong detector card purchased?
Poster: apalmentieri
Posted Date: 2010-03-01 15:22:10.0
A response from Adam at Thorlabs to fschewe: The text on the physical VRC2 card shown on our website is incorrect. The range is 400-640nm and we will correct this picture right away. If you recieved a card with the incorrect text, we can send a replacement card out to you.
Poster: fschewe
Posted Date: 2010-02-26 15:01:24.0
On the VRC2 is written 400-540 nm but it is officially specified for 400-640 nm. What is right?
Poster: klee
Posted Date: 2009-11-20 16:10:50.0
A response from Ken at thorlabs to traub: Unfortunately, we do not carry any viewing card for the Mid-IR range. I was unable to source this from other companies neither.
Poster: traub
Posted Date: 2009-11-18 15:26:53.0
Hello, I search for a sensor card that works in the mid infrared (2-5 um). I did not find such a card in your product catalog and/or website. Can you help me finding such MIR sensor cards? Thanks in advance, Tobias
Poster: Laurie
Posted Date: 2009-04-21 16:55:14.0
Response from Laurie at Thorlabs to smarka: Thank you for your interest in our products. We can provide the VRC4 with the requested dimensions. To provide a quote, we will need some additional information. Someone from our technical support staff will contact you directly.
Poster: smarka
Posted Date: 2009-04-20 11:43:10.0
I would like to know whether it would be possible to have VDIR (or VRC4) coated material available in larger sheets. 4"x4" or 10"x10" would be extremely useful. Thank you!
Poster: Tyler
Posted Date: 2008-11-03 16:58:13.0
A response from Tyler at Thorlabs to aren100won: I will contact you via email in case you had trouble with our feedback form.
Poster: Tyler
Posted Date: 2008-11-03 16:56:42.0
A response from Tyler at Thorlabs to Antonio_Oliver: I will forward this question to our technical support department who will then contact you. Thank you for considering us for this request. We always appreciate hearing about what the research community needs and Thorlabs is dedicated to fulfilling those needs whenever possible.
Poster: aren100won
Posted Date: 2008-11-03 02:44:02.0
sdfsdf
Poster: Antonio_Oliver
Posted Date: 2008-10-22 08:39:52.0
I would like to be able to purchase a large 30cm by 30cm detection "sheet." For our application, we often have to locate and align an array of multiple beams at once. Is it possible to get a custom product like what I have described above? Antonio
Poster: TechnicalMarketing
Posted Date: 2007-11-19 11:24:16.0
Dear acable, Thank you for your excellent suggestions. The active area of the VC-1550, VC-VIS/IR, and VC-UV viewing cards has been extended to the edge of the card and the back of the card behind the active region no longer has black ink on it so that in certain conditions the spot can be seen through the card. Your request for adding the absorption curves to the back of the card has been forwarded to a design engineer and will hopefully be implemented in the future.
Poster: acable
Posted Date: 2007-11-10 14:20:23.0
It would be good to extend the active area right to the end of the card. Also the back side of the card should be white, with the room lights out i can typically see a spot thru the card after i scrap off the black ink. It would also be good to have separate price boxes for each of the cards, with a photo of the card and the corresponding response curve. Not sure if the response curve is printed on the back of the VC-series cards but if not i would suggest adding it.
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alignment tools   detector card   detector cards   IR card   IR cards   ir viewer   laser viewing card   MIR card   MIR Viewer   optical detector   UV card   UV Viewer   viewing card   viewing cards   Visible Viewer  
UV/VIS Detector Card: 250 to 540 nm
  • Does Not Require Charging
  • Two Engraved Reticles for Use in Beam Collimation
  • Wavelength Range Printed on Card
  • Overall Dimensions (W x H): 2.1" x 3.4" (54.0 mm x 85.7 mm)

The VRC1 is a credit-card-sized detector card for viewing light in the 250 - 540 nm range. This card is made from a durable plastic and has a photosensitive region adhered to the front surface that allows for the easy location of an UV light beam and its focal point. Since the active region does not require charging, the emission is persistent even when used in CW applications in a darkened room.  

To facilitate the use of the card during alignment procedures, the detection region extends all the way to the edge of the card and includes two engraved reticles for use in laser beam collimation. In addition, when the card is used in a darkened room with a sufficiently bright source, the fluorescence from the activated photosensitive region can be seen through the back of the card or the photosensitive region can be activated by illuminating the back of the card. This is especially useful for aligning the overlap of two beams.

Item # Absorption Band Emission BandSensitivity Graph Active Region Dimensions Dimension InformationCharging Required
VRC1 250 - 540 nm ~450 - 750 nm VRC1 Absorption and Emission Bands 1.25" x 2.1" (31.8 mm x 54.0 mm) info No
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
VRC1 Support Documentation
VRC1 UV/VIS Detector Card, 250 - 540 nm
$76.65
Today
VIS/NIR Detector Card: 400 to 640 nm and 800 to 1700 nm
  • Requires Charging by Visible Light
  • Two Engraved Reticles for Use in Beam Collimation
  • Wavelength Range Printed on Card
  • Overall Dimensions (W x H): 2.1" x 3.4" (54.0 mm x 85.7 mm)

The VRC2 is a credit-card-sized detector card for viewing light in the 400 to 640 nm or the 800 to 1700 nm range. This card is made from a durable plastic and has a photosensitive region adhered to the front surface that allows for the easy location of a visible or near-infrared (NIR) light beam and its focal point. Proper function of this card requires charging it with visible light before use. Additionally, because emissions from the card are not persistent, the user must move the card around for optimal brightness of the beam spot. To facilitate the use of the card during alignment procedures, the detection region extends all the way to the edge of the card and includes two engraved reticles for use in laser beam collimation.

Item # Absorption Bands Emission BandSensitivity Graph Active Region Dimensions Dimension InformationCharging Required
VRC2 400 - 640 nm and 800 - 1700 nm ~580 - 750 nm VRC2 Absorption and Emission Bands 1.25" x 2.1" (31.8 mm x 54 mm) info Yes
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
VRC2 Support Documentation
VRC2 VIS/IR Detector Card, 400 - 640 nm, 800 - 1700 nm
$76.65
Today
NIR Detector Card: 700 to 1400 nm
  • Requires Charging by Visible Light
  • Sensitivity Curve Printed on Card
  • Overall Dimensions (W x H): 1.79" x 2.4" (45.5 mm x 61.9 mm)

Measuring 2.4" x 1.79" (61.9 mm x 45.5 mm), the VRC5 is designed for viewing light in the 700 to 1400 nm range. This card requires charging by visible light for proper function. The photosensitive area measures 1.5" x 0.75" (38.1 mm x 19 mm) and is encapsulated between two layers of durable clear plastic.

Item # Absorption Band Emission BandSensitivity  Graph Active Region Dimensions Dimension InformationCharging Required
VRC5 700 - 1400 nm Visible VRC5 Absorption and Emission Bands 0.75" x 1.5"
(19.0 mm x 38.1 mm)
info Yes
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
VRC5 Support Documentation
VRC5 IR Detector Card, 700 - 1400 nm
$119.70
Today
NIR Detector Card: 790 to 840 nm, 870 to 1070 nm, and 1500 to 1590 nm
  • Does Not Require Charging by Visible Light
  • Two Engraved Reticles for Use in Beam Collimation
  • Wavelength Range Printed on Card
  • Overall Dimensions (W x H): 2.1" x 3.4" (54.0 mm x 85.7 mm)

The VRC4 is a credit-card-sized detector card for viewing light in the 790 to 840 nm, 870 to 1070 nm, and 1500 to 1590 nm ranges. This card is made from a durable plastic and has a photosensitive region adhered to the front surface that allows for the easy location of a near-infrared (NIR) light beam and its focal point. Since the active region does not require charging, the emission is persistent even when used in CW applications in a darkened room.

To facilitate the use of the card during alignment procedures, the detection region extends all the way to the edge of the card and includes two engraved reticles for use in laser beam collimation. In addition, when the card is used in a darkened room with a sufficiently bright source, the fluorescence from the activated photosensitive region can be seen through the back of the card or the photosensitive region can be activated by illuminating the back of the card. This is especially useful for aligning the overlap of two beams.

Item # Absorption Bands Emission BandSensitivity Graph Active Region Dimensions Dimension InformationCharging Required
VRC4 790 - 840 nm, 870 - 1070 nm,
and 1500 - 1590 nm
~520 - 580 nm VRC4 Absorption and Emission Bands 1.25" x 2.1" (31.8 mm x 54 mm) info No
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
VRC4 Support Documentation
VRC4 IR Detector Card, 790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm
$76.65
Today
MIR Detector Card: 1500 to >13,200 nm
VRC6 Small Spot
Ø0.5 mm Spot at 0.3 W/cm2
VRC6 Large Spot
Ø1.0 mm Spot at 2.0 W/cm2
  • Liquid Crystal Film Changes Color When Exposed to Mid-IR (MIR) Light
  • Active Area: 2.1" x 1.25" (54.0 mm x 31.8 mm)
  • Minimum Detectable Power Density: 0.3 W/cm2 @ 1550 nm
  • Recovery Time: <1 Second
  • Overall Dimensions (W x H): 2.1" x 3.4" (54.0 mm x 85.7 mm)

The VRC6 MIR laser viewing card has been tested to work with wavelengths from 1.5 µm to at least 13.2 µm. The detector area on this card is a thin layer of liquid crystal that has been printed onto the black metal card. Thermochromic liquid crystals are temperature-sensitive organic chemicals with twisted helical molecular structures. The MIR light changes the temperature of the detector area, resulting in a color change. The detector area is green between 25 and 30 °C, and it is black or brown otherwise. Simply tap the card on a tabletop to return the color to the resting state.

The detection region extends all the way to the edge of the card in order to facilitate the use of the card during alignment procedures, and each card features two engraved reticles for use in laser beam collimation.

Please Note: The spot size on the card will vary depending on beam power. The photos to the right demonstrate the spot size on the card at the minimum detected power density, 0.3 W/cm2, and at 2.0 W/cm2. The engraved reticles are also visible in these photos. Please see the Graphs tab for more photos and details on the spot size variation.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
VRC6 Support Documentation
VRC6 MIR Liquid Crystal Detector Card
$25.00
Today
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Last Edited: Jul 25, 2013 Author: Lori Stover