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Fluorescing and Liquid Crystal Alignment Disks


  • Fluorescing and Liquid Crystal Disks for Wavelengths from UV to MIR
  • Central Hole or Target Aids Alignment
  • Available Unmounted, with SM1 or RMS Threads, or Attached to a Cage-Mountable Plate

VRC6SCPT

MIR Alignment Plate

VRC1SM1

SM1 UV/Visible Alignment Disk

VRC4D05

Ø1/2" IR
Alignment Disk

VRC2D1

Ø1" Visible/IR
Alignment Disk

VRC4CPT

Placed in a 30 mm
Cage System

ADF1

Ø1" Visible Blue 
Alignment Disk

ADF5

Ø1" Visible Red 
Alignment Disk

Related Items


Please Wait
Alignment Disk Selection Guide
Source Absorption Band Emission Band Material
UV/Visible 250 - 540 nm 450 - 750 nm Fluorescing Slow-Fading Phosphor
UV/Visible/NIR - Blue, Green, Yellow, Orange, and Red Fluorescing Cast Acrylic
Visible/IR 400 - 640 nm and
800 - 1700 nm
~580 - 750 nm Fluorescing Slow-Fading Phosphor
IR 790 - 840 nm,
870 - 1070 nm,
and 1500 - 1590 nm
~520 - 580 nm Fluorescing Slow-Fading Phosphor
Mid-IR 1500 - 13 200 nm N/A Thermochromic Liquid Crystal

Features

  • Ø1/2" and Ø1" Unmounted Fluorescing Disks for Visible to IR Alignment
  • SM1-Threaded Fluorescing Disks for UV to IR Alignment
  • RMS-Threaded Fluorescing Disks for Visible to IR Alignment
  • Cage-Plate-Mounted Fluorescing Disk for IR Alignment
  • SM1-Threaded and Cage-Plate-Mounted Liquid Crystal Disks for MIR Alignment

Our alignment disks are made from either fluorescing or liquid crystal material to aid the alignment of ultraviolet (UV) to mid-infrared (MIR) beams. We offer Ø1/2" or Ø1" fluorescing, slow-fading phosphor disks unmounted, SM1-threaded (1.035"-40), RMS-threaded (0.800"-36), or mounted to a drop-in cage plate. The unmounted and cage-plate-mounted disks feature a centered Ø1.5 mm through hole, while the threaded disks have an alignment target. The graphs below detail the absorption and emission bands of these fluorescing, slow-fading phosphor disks, which are made of the same materials as those used in our laser viewing cards. Our Ø1" fluorescing cast acrylic disks are available in five colors: blue, green, yellow, orange, and red. These disks have fluorescence spectra similar to various fluorophores, making them ideal for use with a variety of lasers used in fluorescence imaging; see the graph below for more details. Our MIR liquid crystal alignment disks are available mounted to a drop-in cage plate with a Ø10.0 mm active region or a SM1-threaded disk with a Ø20.0 mm active region.

Fluorescing Disks, Slow-Fading Phosphor

Item # Operating Wavelength Range(s)
(Click for Graph)
Emission Band Active Region Mounting Alignment Feature Requires Charging
VRC1SM1 250 - 540 nm 450 to 750 nm Ø0.79"
(Ø20 mm)
External SM1 (1.035"-40) Threading Target Guide Lines
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
No
VRC2D05 400 - 640 nm,
800 - 1700 nm
~580 to 750 nm Ø1/2"
(Ø12.7 mm)
Ø1/2" Unmounted Ø1.5 mm Hole in VIS/IR Disk Center Yes
VRC2RMS Ø0.7"
(Ø18 mm)
External RMS (0.800"-36) Threading Target Guide Lines
 Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2SM1 Ø0.79"
(Ø20 mm)
External SM1 (1.035"-40) Threading Target Guide Lines
 Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2D1 Ø1"
(Ø25.4 mm)
Ø1" Unmounted Ø1.5 mm Hole in VIS/IR Disk Center
VRC4D05 790 - 840 nm,
870 - 1070 nm,
1500 - 1590 nm
~520 to 580 nm Ø1/2"
(Ø12.7 mm)
Ø1/2" Unmounted Ø1.5 mm Hole in IR Disk Center No
VRC4CPT Ø1/2"
(Ø12.7 mm)
Ø1/2" Disk Mounted on
Drop-In Cage Plate
Ø1 mm Hole in Plate
Ø1.5 mm Hole in IR Disk Center
VRC4SM1 Ø0.79"
(Ø20 mm
External SM1 (1.035"-40) Threading Target Guide Lines
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC4D1 Ø1"
(Ø25.4 mm)
Ø1" Unmounted Ø1.5 mm Hole in IR Disk Center

Fluorescing Disks, Cast Acrylic

Item # Color Active Region Thickness Mounting Alignment Feature Requires Charging
ADF1(-P5) Blue Ø1" (Ø25.4 mm) 1.7 mm ± 0.2 mm Ø1" Unmounted Target Guide Lines,
Ø3.4 mm and Ø9.4 mm
Concentric Circles
No
ADF2(-P5) Green
ADF3(-P5) Yellow
ADF4(-P5) Orange
ADF5(-P5) Red

Liquid Crystal Disk

Item # Operating Wavelength Range(s) Emission Band Active Region Mounting Alignment Feature Requires Charging
VRC6SCPTa 1.5 to >13.2 µm N/A Ø0.39"
(Ø10.0 mm)
Ø10.0 mm Disk Mounted on
Drop-In Cage Plate
Ø1 mm Hole in Plate
Ø2.0 mm Hole in Disk Center
No
VRC6SM1a Ø0.79"
(Ø20.0 mm)
External SM1 (1.035" -40) Threading Target Guide Lines
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
  • Minimum Detectable Power Density: 0.05 W/mm2 @ 1550 nm (22 °C)

Posted Comments:
h.wu  (posted 2018-06-11 15:57:49.623)
Could you provide me with VRC2D1 and VRC4D1 without Ø1.5 mm hole in disk center? Thanks.
llamb  (posted 2018-06-12 10:42:06.0)
Hello, thank you for contacting Thorlabs. Unfortunately providing VRC2D1 or VRC4D1 without the center hole will not be cost effective for small quantities, though it may be possible. I would recommend the VRC2SM1 and VRC4SM1 instead, that feature target guide lines instead of center holes. In case a custom quote is necessary instead of these alternatives, we will reach out to you directly to discuss this further.
asaumier  (posted 2017-03-28 05:11:54.72)
Hi, a VRC4RMS would be a very interesting product to add because the VRC2 material fade too much rapidly for a target use.
tfrisch  (posted 2017-03-31 10:04:30.0)
Hello, thank you for contacting Thorlabs. I have posted your feedback in our internal engineering forum, and I will reach out to you directly about your application and IR source.
salutmoi  (posted 2016-12-26 13:56:31.94)
Our laser emits pulsed radiation (pulse duration 9 nanoseconds, 1 pulse per second) at 1540 nm. We are going to concentrate the beam into a "point" (small circle) with power density of approximately 1 W/(cm^2). How much time do these alignment discs and cards (VRC2, VRC4, VRC6) fade? (will the visualization be possible?)
tfrisch  (posted 2016-12-30 01:44:34.0)
Hello, thank you for contacting Thorlabs. I will reach out to you directly about this application.
user  (posted 2016-04-05 00:29:58.407)
Can we please have these disks that detects UV as well? Possibly made from the same material as the VRC1 detector cards? Thanks!
besembeson  (posted 2016-04-05 11:21:43.0)
Response from Bweh at Thorlabs USA: Thanks for your feedback. We will look into expanding these alignment discs to include the VRC1 material.
franxm  (posted 2015-06-11 11:05:26.207)
Hi Thorlabs: interested in a VRC4D05 attached and precisely centered on a LMR1AP housing for alignment. Thanks, Fran
besembeson  (posted 2015-09-21 09:55:02.0)
Response from Bweh at Thorlabs USA: This can be quite useful as well for certain alignment purposes. You can do this with a suitable glue and alignment jig or we can quote this as a special item.
vl  (posted 2014-11-25 17:14:29.413)
VRC2D1 smells like rotten eggs, it's digusting. Anyway you can improve that?
cdaly  (posted 2014-11-26 02:15:56.0)
Response from Chris at Thorlabs: Thank you for your feedback. We can take this into consideration for any future versions, but at this time, there is nothing we can do about the scent of the alignment disk.
cbrideau  (posted 2013-06-17 19:46:52.773)
Can we get the beam pass-through holes every 1/2" instead of just 1"?
cdaly  (posted 2013-06-20 14:36:00.0)
Response from Chris at Thorlabs: Thank you for your feedback. I will bring up your suggestion within our forums, but in the meantime, we can likely do this as a custom if you are interested. I will contact you directly about this.
tcohen  (posted 2012-05-24 11:39:00.0)
Response from Tim at Thorlabs: Thank you for sharing your idea with us! I agree that putting in a through hole would be a useful feature. A 5mm diameter hole would limit the use for smaller beam diameters and therefore may limit its value for some users. We would love to hear more feedback on this and would like to encourage others to post their opinions as well. For your immediate needs, we would be happy to provide this as a custom and I will contact you to get more information.
matthew.hammond  (posted 2012-05-22 20:40:37.0)
I've bought the SM1A7 and have drilled a hole in the middle of it many times. Is there a way Thorlabs could provide a pre-drilled (1mm to 5mm diam) hole someday? That would save me some time on the drill press
lmorgus  (posted 2011-02-05 13:06:00.0)
A response from Laurie at Thorlabs to acable: Thank you for your feedback concerning our alignment tool offering and the need for having our irises more strongly linked to this page, which is devoted to items that are solely used for alignment purposes. Thorlabs does indeed manufacture a wide selection of SM1-threaded irises, which are located on three different pages of our website. To make that connection more readily visible, we have moved irises from being the 5th related items link to being second on this page. As a result of your feedback, we also discovered that we didn't have any linkage from our iris pages back to this one. Thank you for taking the time to help us improve our website, and we hope these changes make it easier for you to navigate our product portfolio.
acable  (posted 2011-02-05 12:07:39.0)
Iris in SM1 housing seems to be missing from this page.
Thorlabs  (posted 2010-07-09 11:58:15.0)
Response from Javier at Thorlabs to last poster: thank you for your feedback. We can certainly modify an SM1A7 with a 1 mm diameter through hole like the LMR1AP. We can also expand the design of the LMR1AP with a new part that is compatible with the LM1-A and LM1-B nested mounts. Please send us an e-mail at techsupport@thorlabs.com to further discuss your requirements.
user  (posted 2010-07-08 16:42:44.0)
You should make your threaded target (SM1A7) with a hole like your LMR1AP. Can you make a target that hangs on a LM1-A/B pair instead of threading in?
apalmentieri  (posted 2010-01-28 14:45:26.0)
A response from Adam at Thorlabs to Paul: I am in the process of looking into a custom option that would allow you to use our products at 780nm. If this custom option is available, we can also consider adding this to the new product line.
paulwb  (posted 2010-01-28 14:39:15.0)
Oops, I meant to say that we bought a VRC4CPT, the one with the IR disk. The CPA1 and CPA2 plates dont have an IR disk. The following was done in a very dim lab. A 35 mW, 800 um beam of 780 will produce an extremely pale green dot on the target, but the dot is only visible if I turn my head and look at it through my laser goggles at an angle. Looking at it head on, it is invisible. The goggles are Kentek KRZ-C505C. They are OD 7+ at 532 and 755-810 nm, among others. And thats where my problem was: using other goggles, amber Thorlabs that are OD7 at 190-534 nm and I have measured to be OD 3.2 at 780 nm, I can see the green dot for about 25 mW, same waist size. I guess Ill have to switch goggles to do the aligning. It would be great if you could make an alignment plate like the VRC4CPT but using the material thats in the IRC3 card, now superseded by the VRC5 card.
apalmentieri  (posted 2010-01-27 15:57:06.0)
A response from Adam to Paul: At this time we do not have an IR alignment disk that works at 780nm. However, we would be interested in how our VRC4CPT would work at 780nm. We can provide you with a free sample if you would provide us with the test data. We are also looking into custom versions that may work for 780nm at this time.
paulwb  (posted 2010-01-27 15:41:34.0)
I bought a CPA1, not having noticed that it is not useful for 780 nm. Could you make one that works at 780 nm? In the meantime, I may consider sacrificing an old IR card.
Alignment Disk and Laser Viewing Card Selection Guide
(Click
Representative
Drawing for Details;
Not to Scale)

Wavelengths Ø1/2” Unmounted Disk Ø1” Unmounted Diska Threaded Disk Cage-Plate-Mounted Disk Viewing Cards
250 - 540 nm - - VRC1SM1
(SM1 Threading)
- VRC1
400 - 640 nm
800 - 1700 nm
VRC2D05 VRC2D1 VRC2RMS
(RMS Threading)
- VRC2
VRC2SM1
(SM1 Threading)
700 - 1400 nm - - - - VRC5
790 - 840 nm,
870 - 1070 nm,
1500 to 1590 nm
VRC4D05 VRC4D1 VRC4SM1
(SM1 Threading)
VRC4CPT VRC4
1500 - >13 200 nm - - VRC6SM1
(SM1 Threading)
VRC6SCPT VRC6S

Fluorescing Alignment Disk for UV/Visible Source, Slow-Fading Phosphor


Click to Enlarge

Absorption and Emission Bands for the VRC1SM1
  • Absorption Band: 250 - 540 nm
  • Does Not Require Charging
  • Centered Target Aids Alignment
  • Externally SM1 (1.035"-40) Threaded

This alignment disk is designed to simplify the alignment of UV and visible beams. It is made from the same slow-fading phosphor material as our VRC1 laser viewing card and features a target that clearly marks the optical axis of any setup. The back of the disk features external SM1 (1.035"-40) threading for compatibility with our Ø1" lens tubes and optic mounts.

Item # Absorption Band Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC1SM1 250 - 540 nm 450 to 750 nm Ø0.79" (Ø20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
No
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VRC1SM1 Support Documentation
VRC1SM1SM1-Threaded UV and Visible Alignment Disk (250 - 540 nm)
$84.57
Today

Fluorescing Alignment Disks for UV/Visible/NIR Source, Cast Acrylic


Click to Enlarge

Raw Data
Fluorescence of the five disks when illuminated with Thorlabs' Fiber-Coupled LEDs. This data is typical; performance may vary from lot to lot. 
  • Fluorescing Cast Acrylic Disks Available in Five Colors: Blue, Green, Yellow, Orange, and Red
  • Each Disk Sold Individually or in Packs of Five
  • Ø1" and 1.7 ± 0.2 mm Thick
  • Engraved with Target Guide Lines, and Ø3.4 mm and Ø9.4 mm Concentric Circles
  • Compatible with Our Ø1" Fixed Optic Mounts or Lens Tubes

These alignment disks are designed to align fluorescence imaging systems. They are manufactured from cast acrylic material and have fluorescence spectra similar to various fluorophores, making them ideal for use with a variety of lasers used in fluorescence imaging. Each disk is 1" in diameter and has a thickness of 1.7 mm. A target with two concentric circles is engraved on every disk for easy alignment. For custom sizes up to 1' x 2', please contact Tech Support. For more details, please see the full web presentation

These disks can be mounted with our Ø1" fixed optic mounts or lens tubes

Item # Color Dimensions Thickness Mounting Alignment Feature Transmission 
(Click for Graph)
Requires Charging
ADF1(-P5) Blue Ø1" (Ø25.4 mm) 1.7 mm ± 0.2 mm Ø1" Unmounted Target Guide Lines,
Ø3.4 mm and Ø9.4 mm
Concentric Circles

Raw Data
No
ADF2(-P5) Green
ADF3(-P5) Yellow
ADF4(-P5) Orange
ADF5(-P5) Red
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
ADF1 Support Documentation
ADF1NEW!Fluorescent Alignment Disk, Blue
$8.00
Today
ADF1-P5 Support Documentation
ADF1-P5NEW!Fluorescent Alignment Disk, Blue, 5 Pack
$30.00
Today
ADF2 Support Documentation
ADF2NEW!Fluorescent Alignment Disk, Green
$8.00
Today
ADF2-P5 Support Documentation
ADF2-P5NEW!Fluorescent Alignment Disk, Green, 5 Pack
$30.00
Today
ADF3 Support Documentation
ADF3NEW!Fluorescent Alignment Disk, Yellow
$8.00
Today
ADF3-P5 Support Documentation
ADF3-P5NEW!Fluorescent Alignment Disk, Yellow, 5 Pack
$30.00
Today
ADF4 Support Documentation
ADF4NEW!Fluorescent Alignment Disk, Orange
$8.00
Today
ADF4-P5 Support Documentation
ADF4-P5NEW!Fluorescent Alignment Disk, Orange, 5 Pack
$30.00
Today
ADF5 Support Documentation
ADF5NEW!Fluorescent Alignment Disk, Red
$8.00
Today
ADF5-P5 Support Documentation
ADF5-P5NEW!Fluorescent Alignment Disk, Red, 5 Pack
$30.00
Today

Fluorescing Alignment Disks for Visible/IR Source, Slow-Fading Phosphor


Click to Enlarge

Absorption and Emission Bands for the VRC2 Alignment Disks
  • Absorption Bands: 400 - 640 nm and 800 - 1700 nm
  • Requires Charging by Visible Light
  • Ø1/2" or Ø1" Unmounted, or SM1 Threaded

These alignment disks are designed to simplify the alignment of visible and IR beams. They are made from the same slow-fading phosphor material as our VRC2 laser viewing card. Ø1/2" and Ø1" unmounted versions are available. Alternatively, we offer alignment disks with external RMS (0.800"-36) or SM1 (1.035"-40) threading for compatibility with an RMS-threaded microscope objective lens or an SM1 lens tube system, respectively.

Item # Absorption Bands Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC2D05 400 - 640 nm,
 800 - 1700 nm
~580 to 750 nm Ø1/2" (Ø12.7 mm) Ø1/2" Unmounted Ø1.5 mm Hole in Disk Center Yes
VRC2RMS Ø0.7" (Ø18 mm) External RMS (0.800"-36) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2SM1 Ø0.79" (20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2D1 Ø1" (Ø25.4 mm) Ø1" Unmounted Ø1.5 mm Hole in Disk Center
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VRC2D05 Support Documentation
VRC2D05Ø1/2" Visible and IR Alignment Disk (400 - 640, 800 - 1700 nm)
$22.59
Today
VRC2RMS Support Documentation
VRC2RMSRMS-Threaded Visible and IR Alignment Disk (400 - 640 nm, 800 - 1700 nm)
$88.52
Today
VRC2D1 Support Documentation
VRC2D1Ø1" Visible and IR Alignment Disk (400 - 640, 800 - 1700 nm)
$35.99
Today
VRC2SM1 Support Documentation
VRC2SM1SM1-Threaded Visible and IR Alignment Disk (400 - 640 nm, 800 - 1700 nm)
$84.57
Today

Fluorescing Alignment Disks for IR Source, Slow-Fading Phosphor


Click to Enlarge

Absorption and Emission Bands for the VRC4 Alignment Disks
Back View of VRC4CPT
Click to Enlarge
Back View of VRC4CPT in a 30 mm Cage System
  • Absorption Bands: 790 - 840 nm, 870 - 1070 nm, and 1500 - 1590 nm
  • Does Not Require Charging
  • Ø1/2" or Ø1" Unmounted, SM1 Threaded, or Cage Plate Mounted

These alignment disks are designed to simplify the alignment of IR beams. They are made from the same slow-fading phosphor material as our VRC4 laser viewing card. Ø1/2" and Ø1" unmounted disks are available, as well as a mounted disk with external SM1 (1.035"-40) threading on one side for compatibility with our Ø1" lens tubes.

The VRC4CPT features an alignment disk mounted on a drop-in cage plate for quickly aligning a beam in a 30 mm cage system. The back side of the plate features a laser-engraved alignment target with Ø4 mm, Ø7 mm, Ø10 mm, and Ø13 mm concentric circles, as shown in the photo to the right.

Item # Absorption Bands Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC4D05 790 - 840 nm,
 870 - 1070 nm,
 1500 - 1590 nm
~520 to 580 nm Ø1/2" (Ø12.7 mm) Ø1/2" Unmounted Ø1.5 mm Hole in Disk Center No
VRC4CPT Ø1/2" (Ø12.7 mm) Ø1/2" Mounted on Drop-In Cage Plate Ø1 mm Hole in Plate
Ø1.5 mm Hole in Disk Center
VRC4SM1 Ø0.79" (Ø20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC4D1 Ø1" (Ø25.4 mm) Ø1" Unmounted Ø1.5 mm Hole in Disk Center
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VRC4D05 Support Documentation
VRC4D05Ø1/2" Alignment Disk, S,C, & L Bands (790 - 840, 870 - 1070, 1500 - 1590 nm)
$22.59
Today
VRC4CPT Support Documentation
VRC4CPT30 mm Cage System Alignment Plate with IR Disk (790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm)
$31.79
Today
VRC4SM1 Support Documentation
VRC4SM1SM1-Threaded IR Alignment Disk (790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm)
$84.57
Today
VRC4D1 Support Documentation
VRC4D1Ø1" Alignment Disk, S,C, & L Bands (790 - 840, 870 - 1070, 1500 - 1590 nm)
$35.99
Today

MIR Thermochromic Liquid Crystal Alignment Disks

Back View of VRC6CPT
Click to Enlarge

Back View of VRC6SCPT in a 30 mm Cage System
  • Liquid Crystal Film Changes Color When Exposed to Mid-Infrared (MIR) Light
  • Does Not Require Charging
  • Minimum Detectable Power Density: 0.05 mW/mm2 @ 1550 nm (22 °C)
  • Ambient Operating Temperature: 20 to 24 °C
  • Ambient Temperature for Peak Sensitivity and Visibility: 22 °C
  • Use with Our 30 mm Cage Components or SM1 Lens Tube System
 The detector area of the VRC6SM1 changed to green due to ambient temperature increase.
Click to Enlarge

The active areas of the VRC6SM1 and VRC6SCPT alignment disks change color above 23° C.

The VRC6SCPT Cage-Plate-Mounted Alignment Disk and VRC6SM1 SM1-Threaded MIR Alignment Disk are made of the same material as our VRC6S Detector Card and have been tested with laser sources of wavelengths ranging from 1.5 µm to 13.2 µm. This VRC6SCPT is composed of an alignment disk adhered to an anodized aluminum cage alignment plate. The disk is positioned such that its Ø2.0 mm central hole is concentric with the plate's Ø1 mm through hole and aligned with the exact center of a 30 mm cage system. The back side of the plate features a laser-engraved alignment target with Ø4 mm, Ø7 mm, Ø10 mm, and Ø13 mm concentric circles (see photo to the right). The VRC6SM1 consists of an alignment disk encased within an SM1 housing and is designed to simplify the alignment of MIR beams when used with an SM1 lens tube system. The active region of the VRC6SM1's disk is Ø0.79" with Ø3 mm and Ø9 mm concentric circular target guide lines (see photo to the left).

The recommended ambient temperature range for these alignment disks is 20 to 24 °C, with peak sensitivity and responsivity at an ambient temperature of 22 °C. The detector area is black below approximately 23 °C. Above this temperature the detector will turn red, then yellow, then green and finally blue/violet around 28 °C (see photo to the left). This color change occurs whether heated by laser exposure or increased ambient temperature. The responsivity will be reduced when used at an ambient temperature below 20 °C since the material will require more time for the area exposed to the laser to reach a temperature above 23 °C, and the alignment disks will exhibit lower sensitivity above 24 °C since the color contrast between the laser-exposed region and the rest of the active region will be reduced.

To restore the VRCS6M1 alignment disk after beam exposure, blow air on the active area with a duster such as the CA4-US or CA4-EU. The active area of the VRC6SCPT cage-plate-mounted alignment disk can be restored by resting the plate face down on a table top (i.e. an optical table with stainless steel surface) for a few minutes. These disks may take longer to recover after exposure to higher laser energy, and sometimes the color change may look permanent at room temperature. If this occurs, place the affected alignment disk in a refrigerator at 0 to 4 °C for a few minutes to accelerate the recovery.

Please Note: The spot size on the disks will vary depending on power density. See the Laser Viewing Cards presentation for more information.

Item # Absorption Band Minimum Detectable Power Density Active Region Alignment Feature Requires Charging
VRC6SCPT 1.5 to >13.2 µm 0.05 mW/mm2 @ 1550 nm (22 °C) Ø0.39" (Ø10.0 mm) Ø1 mm Hole in Plate
Ø2.0 mm Hole in Disk Center
No
VRC6SM1 Ø0.79" (Ø20.0 mm) Target Guide Lines, Ø3 mm and Ø9 mm
Concentric Circles, (±0.22 mm Concentricity)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VRC6SCPT Support Documentation
VRC6SCPT30 mm Cage System Alignment Plate with MIR Disk, 1.5 to >13.2 µm
$37.08
Today
VRC6SM1 Support Documentation
VRC6SM1NEW!SM1-Threaded MIR Alignment Disk, 1.5 to >13.2 µm
$40.00
Today
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Last Edited: Jul 25, 2013 Author: Lori Stover