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Shearing Interferometers


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Shearing Interferometers

Converging or Diverging
Converging Light Diverging Light
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Shearing Interferometer Drawing
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Cross-Section of Shearing Interferometer with Optional Cage System Adapter Plate

Features

  • Qualitative Beam Collimation Test for Beams with Diameters from 1 to 50 mm
  • Magnetically Coupled Kinematic Design Allows Shear Plates to be Interchanged Quickly
  • Imperial and Metric Threaded Mounting Holes

Thorlabs' Shearing Interferometers can be used to determine if a coherent beam of light is collimated. The design consists of a wedged optical flat mounted at 45° and a diffuser plate with a ruled reference line down the middle. These interferometers are designed to provide qualitative analysis of a beam's collimation.

The diffuser plate is used to view the interference fringes created by Fresnel reflections from the front and back surfaces of the optical flat. If the beam is collimated, the resulting fringe pattern will be parallel to the ruled reference line. In addition to the degree of collimation, the fringes will also be sensitive to spherical aberration, coma, and astigmatism.

The wedged optical flat is made of uncoated UV fused silica. The wedge angle for each plate size is optimized for the range of the acceptable beam sizes; see the Specs tab for details. Since the light is incident on the plate at a 45° angle, the intensity of the fringe pattern is dependent on the polarization of the light. Maximum intensity will occur when the polarization is perpendicular to the plane of incidence.

In order to observe interference fringes, the coherence length of the incident light must be longer than the change in optical path length caused by the shear plate. See the table footnote on the Specs tab for more information.

Shearing Interferometer Drawing
Click to Enlarge

30 mm Cage Plate secured to the rear of a SI254 Shearing Interferometer

Construction
Each shearing interferometer comes in a case as a set of three pieces: a base, a plate with the wedged optical flat, and a plate with the diffuser viewing screen. To set up the interferometer, attach the viewing screen plate to the base using the included 4-40 screws and hex key. The shear plate is held in place magnetically, allowing it to be easily swapped out for a plate with a different wedged optical flat.

The base is constructed from anodized aluminum and features tapped holes for mounting to Ø1/2" posts. The base of all interferometers except the SI500 features four 4-40 tapped holes on the back side, allowing them to be mounted in our 30 mm Cage Systems (see the photo to the left). Please see the Accessories section below for information about mounting the unit into a 30 mm cage system from the front.

Behind the wedged optical flat, a hole is bored through the base to allow the transmitted beam to pass through the optical flat unimpeded. For all models except the SI500, this hole is SM1 threaded (1.035"-40). The cross-sectional view to the right illustrates how the shearing interferometer is constructed as well as the laser beam's propagation path.

Accessories
For small beam diameters, the corresponding fringe pattern will also be small, which can make it difficult to see. For these situations, the SIVS Magnified Viewing Screen accessory can be purchased to replace the standard diffuser plate viewing screen, thereby increasing the size of the fringes on the diffuser plate. The SIVS consists of a mounted diverging lens and diffuser plate and can be used for beam diameters ranging from 1 mm to 10 mm. The SITST replaces the diffuser viewing screen plate with one that offers SM1 threading, which allows SM1 lens tubes and accessories to be attached. The plates containing the wedged optical flats are also available individually so that various beam sizes can be tested using a single base unit.

We also offer two optional adapter plates for attaching a 30 mm cage system or SM1 lens tubes to the input of the shearing interferometer. Both plates integrate the viewing screen and offer 4-40 tapped holes for attaching a 30 mm cage system around a SM1-threaded input aperture. The SICP includes a diffuser for viewing fringes similar to the one provided with our shearing interferometers. Alternatively, the SICPSM1 has SM1 threading in place of the diffuser, which allows lens tubes and other accessories to be mounted at the top of the interferometer where the fringes are viewed.

Please note that none of the accessory plates are compatible with the SI500, which uses a larger base.

Item #Wedge
Angle
Diameter
Diameter ToleranceThickness
Thickness ToleranceApproximate
ΔOPLa
SI035P117 arcsec5.28 mm+0/-0.25 mm0.75 mm±0.25 mm1.91 mm
SI050P83 arcsec7.94 mm+0/-0.25 mm1.30 mm±0.25 mm3.31 mm
SI100P40 arcsec15.60 mm+0/-0.25 mm2.60 mmb±0.25 mm6.62 mm
SI254P18 arcsec38.00 mm+0/-0.25 mm6.35 mmb±0.25 mm16.18 mm
SI500P10 arcsec78.00 mm+0/-0.25 mm13.00 mmb±0.25 mm33.12 mm
  • In order to ensure interference takes place, check to see that the effective coherence length of your source is longer than the approximate change in optical path length (ΔOPL). As the coherence length of your source approaches a few multiples of ΔOPL, the contrast of the interference fringes will decrease. Once the coherence length reaches the ΔOPL, you are effectively imaging incoherent light. This ΔOPL was calculated for UVFS (n=1.457 @ 632.8 nm) with the assumption of parallel reflective surfaces separated by the thickness listed above.
  • Due to the thickness of these optics, the back surface of the shear plate protrudes from the mounting plate. Therefore, care should be taken when inserting or removing these plates from the base unit, especially if the SICP or SICPSM1 cage adapter plates are installed.
Item #Included
Platea
Beam Diameter
for Included Plateb
Compatible PlatesCompatible
Accessories
Threaded
Mounting Holes
Dimensions
(L x W x H)
SI035SI035P1 - 3 mmSI035P, SI050P, SI100P, and SI254PSIVS, SITST, SICP, SICPSM18-32 and M450.8 mm x 48.3 mm x 55.9 mm
SI050SI050P2.5 - 5 mm
SI100SI100P5 - 10 mm
SI254SI254P10 - 25.4 mmSIVSc, SICP, SICPSM1
SI500SI500P25.4 - 50 mmSI500PNone Available1/4"-20 and M6116.8 mm x 133.4 mm x 134.6 mm
  • The wedged plates are made from UVFS
  • Different plates with differing wedge angles are offered for different sized beams. This is to optimize the separation between the plates for particular beam diameters, and thus produce an interference pattern.
  • The SIVS is designed for viewing the small fringes created by small-diameter beams. It is compatible with the SI254 but is not intended or necessary for viewing the fringes of the larger diameter beams that the SI254 is intended for use with.

Above is the transmission curve for UVFS, with light incident normal to the surface. The data shown is for a 1 mm thick, uncoated sample and includes surface reflections.

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Posted Comments:
Poster: sh.han
Posted Date: 2014-01-27 10:03:59.243
Dear Sir or Madame, can I use SI100 at 1550nm? If it is possible, please let me know other requirements. For example, do I need IR camera or something? Thank you in advance.
Poster: sgebhart
Posted Date: 2014-01-23 11:25:13.353
I am trying to use the S100 to test collimation for a superluminescent diode centered at 830nm with a FWHM bandwidth of 18nm, roughly Gaussian spectrum, and 6mm beam diameter. Thus far, I have been unable to see any fringes, with our without the SIVS, with my NIR camera. I can see the overlapping spots, but there is no fringe pattern present within the overlapping region. Please let me know if you have any suggestions. Thanks!
Poster: besembeson
Posted Date: 2014-01-29 11:23:36.0
Response from Bweh E. at Thorlabs: Thanks for choosing Thorlabs. The reason you unable to see any fringes is because of your source. Superluminescent sources have high spatial coherence but their temporal coherence is very low. This means that they also have very short coherence lengths (typically well under 0.1mm). The contrast of the interference fringes decreases as the coherence length of the source approaches a few multiples of the optical path length change (?OPL) in the shearing interferometer . The SI100 has an ?OPL of 6.62mm (for 632.8nm laser or slightly less at 1550nm) meaning that any source with a coherence length less than this value will not produce interference fringes.
Poster: muellenbroich
Posted Date: 2013-11-07 16:24:06.537
One of the little metal balls that fixes the shear plate to the viewing cube has fallen off and disappeared forever more into the optical table. Is it possible to get a replacement? Thanks!
Poster: tcohen
Posted Date: 2013-11-07 03:48:15.0
Response from Tim at Thorlabs: Thanks for bringing this to our attention. We’ll contact you with a replacement and check assembly (they should be permanently epoxied and difficult to displace).
Poster: jlow
Posted Date: 2013-10-17 08:58:00.0
Response from Jeremy at Thorlabs: The effective coherence length of the laser should be much larger than the optical path length difference (around 1.91mm for SI035) to get good fringe contrast. It can also be hard to see the fringes with a Ø1mm beam. We will get in contact with you directly to troubleshoot this.
Poster: muellenbroich
Posted Date: 2013-10-17 12:32:53.333
We just bought the SI035 but I cannot see any fringes. The laserbeam is about 1mm diameter, 445nm, p-polarised (Cobolt MLD™ diode laser) in combination with a ND filter (no3)because I tought eye saturation might be an issue. Can you help to troubleshoot? Would the magnifying accessory definitively help to see the fringes (if there are any)? Cheers!
Poster: avle
Posted Date: 2013-10-14 01:54:25.803
any suggestions for using the shearing interferometer for beam diameters less than 1mm? would using a beam expander before the shearing interferometer work? We regularly have beam diameters that are all centered around .5mm. thanks!
Poster: cdaly
Posted Date: 2013-10-17 16:15:00.0
Response from Chris at Thorlabs: Thank you for using our feedback tool. The beam expander would be the way to improve the visibility. But you'll want to make sure that the beam expander is already well adjusted for your focal length so that the output beam is not giving you any false information about the collimation of the input beam.
Poster: joseph.lawson
Posted Date: 2013-07-15 18:22:25.623
Is it possible to get a replacement diffuser plate?
Poster: tcohen
Posted Date: 2013-07-16 20:04:00.0
Response from Tim at Thorlabs: Yes, we can supply this. We will contact you with a quote.
Poster: tcohen
Posted Date: 2013-01-02 09:47:00.0
Response from Tim at Thorlabs: Thank you for your request. We may be able to offer a modified SI035 with SIVS to suit your needs. There are manufacturing limits on the shear plate that will restrict the diameter from much smaller than 1mm. As you have not provided an email for us to contact you directly, please contact us at techsupport@thorlabs.com to discuss possible solutions for your beam diameter.
Poster:
Posted Date: 2012-12-19 07:26:57.45
Are there plans to offer plates for beam diameters < 1 mm?
Poster: rscholl
Posted Date: 2012-12-05 11:52:00.0
A response from Ryan at Thorlabs: Thank you for contacting us. It sounds like the issue is regarding the contrast of the stripes or interference fringes. This suggests the coherence length is less than several times the optical path length difference of the interfered beams. We will contact you directly for more information.
Poster: martin.vogel
Posted Date: 2012-11-23 14:35:06.927
Hi, I have a strange observation using the SI100: With a blue laser @ 488nm, I see a nice patterns of stripes. With a yellow laser @ 580nm, I also see a stripe pattern, but it is overlaid with a bright spot of light. Any idea what could be the cause for this? Many thanks, Martin
Poster: tcohen
Posted Date: 2012-09-13 13:09:00.0
Response from Tim at Thorlabs: When using the SI100, we would expect to see about ~2.8mm at your wavelength. You will notice the wedge angle increases for smaller beam diameters to reduce the fringe spacing and be discernible in the visible wavelengths. As the fringe spacing is directly proportional to wavelength, it will be larger for 1.55um. Currently, we are working on NIR shearing interferometers to be able to be detected with the same convenience as our visible versions.
Poster: ron.stahl
Posted Date: 2012-09-07 14:29:54.0
What fringe spacing can I expect from a 1.55micron wavelength beam with the SI100? I found a formula that suggests that it would only be a few microns and I'm concerned that I won't be able to see this with my InGaAs camera.
Poster: jjurado
Posted Date: 2011-08-17 13:51:00.0
Response from Javier at Thorlabs to david.milne: The reason why different plates are offered for different ranges of beam diameters is that, in order to observe the interference pattern of a particular beam generated by the front and back surfaces of the shear plate, the wedge angle of the optic needs to be carefully chosen. Launching a large beam onto a small diameter shear plate (and vice versa) will cause the front and back surface beams to be misaligned, preventing the formation of the interference pattern. I will contact you directly for further support.
Poster: david.milne
Posted Date: 2011-08-17 15:19:02.0
Can you explain why you need different shear plates for different beam diameters? For instance if I use a large beam with the small diameter shear plate, will I still see fringes? If I use a small beam with a large diameter shear plate, will I still see fringes?
Poster: jjurado
Posted Date: 2011-08-02 13:47:00.0
Response from Javier at Thorlabs to dcasale: In order to view the fringe pattern generated by the interferometer at 1064nm, it would be necessary to place a translucent fluorescing material on top of (or in place of) the diffuser plate, or to use an IR viewer or camera. We currently do not carry these product, but I will contact you directly with some suggestions.
Poster: dcasale
Posted Date: 2011-08-01 14:17:19.0
What is recommended when viewing 1064nm lasers? Should the top plat be replaced with a fluorescing material, or can it be laid directly on top/below?
Poster: jjurado
Posted Date: 2011-05-04 15:00:00.0
Response from Javier at Thorlabs to Eric Le Moal: Thank you very much for contacting us. I will contact you directly to help you troubleshoot your application.
Poster: eric.le-moal
Posted Date: 2011-05-04 09:09:45.0
Dear Sir/Madam, the shearing interferometer shows no fringe contrast with our laser source that emits 6 ps pulses at 1064 nm (I use a IR camera to look at the shear plate). As 6 ps pulses are relatively short (1.8 mm in vacuum), I wonder if this is a time coherence issue. Could you please tell me what is the thickness of the shear plate itself? (namely the length difference between the two interfering paths) Best regards, Eric Le Moal
Poster: jjurado
Posted Date: 2011-02-24 14:44:00.0
Response from Javier at Thorlabs to Sebastian Jaeger: Thank you for contacting us. In order to integrate our shearing interferometers into our cage systems, it is necessary to use the SITST plate. The current design does not feature additional holes for the 30 mm cage system.
Poster:
Posted Date: 2011-02-24 05:21:47.0
Dear Sir or Madame, is it possible to mount the shearing interferometer in front of an cage-system (e.g. a 30mm cage system) or do I need to go over a SM1 thread by using the SITST plate? Best regards, Sebastian Jäger
Poster: Thorlabs
Posted Date: 2010-09-14 08:58:33.0
Response from Javier at Thorlabs to Holger Fischer: we will contact you directly in order to troubleshoot your application.
Poster: fischer
Posted Date: 2010-09-09 07:31:12.0
Dear Madame or Sir, we have purchased a shearing interferometer (SI100) to determine the collimation of a laser beam. Unfortunately we are not able to see any fringes on the screen of the assembly. The laser beam is well adjusted at 45° to the shear plate with a diameter of about 6-8mm. Different lasers (pulsed and cw) at different wavelengths (780nm, 532nm and 648nm) did not show any result. Do you have any proposition for getting fringes or any contact to get more information on the shearing interferometers? Best regards, Holger Fischer
Poster: apalmentieri
Posted Date: 2010-02-02 13:58:56.0
A response from Adam at Thorlabs to Nick: The wedge angle for these interferometers are 117 arcsec(SI035), 83 Arcsec(SI050), and 40 Arcsec(SI100).
Poster: nick
Posted Date: 2010-02-02 13:23:52.0
Hello, Can you please tell me the wedge angle in the SI035, SI050, and SI100 plates? This is useful in determining fringes across the 500-2000nm range that might be utilized. Thanks, Nick
Poster: Laurie
Posted Date: 2009-04-06 16:21:18.0
Response from Laurie at Thorlabs to msones: Thank you for your interest in our shearing interferometers. Unfortunately, at this time, we do not have the appropriate measurement equipment necessary to determine the degree of fringe tilt in terms of divergence. We regret that we are unable to help you determine this specification. Please let us know if you have additional questions.
Poster: msones
Posted Date: 2009-03-30 18:09:51.0
I need to know the sensitivity of this product: i.e. how many degrees of fringe tilt correspond to how many microradians of divergence (full angle). Assume wavelength = 635nm. Thank you, Mike
Poster: Laurie
Posted Date: 2008-07-15 16:31:43.0
Response from Laurie at Thorlabs to roedel: Dear Christian Rödel: Thank you for your inquiry about our shearing interferometers. I will be contacting you directly with some additional information about the SI750. The clear aperture is 115 mm and the wedge angle is 7 arcsec. If you should need more information, please dont hesitate to contact us.
Poster: roedel
Posted Date: 2008-07-15 14:59:12.0
Dear Sir or Madam, Id like to purchase a shearing interferometer with 50-75mm beam diameter. We want to use it to align collimation but it should be very sensitive. To calculate it can you please send me the parameters of the shearing plate. So the wedge thickness, aperture and angle should be useful. Thanks in advance, Christian Rödel
Poster: laurie
Posted Date: 2008-05-06 13:49:04.0
Response from Laurie at Thorlabs to nolan.real: If you purhcase the SI035 assembly, youll be able to measure beams ranging in diameter from 1-3 mm. Then, you can use the same subassembly (the plate comes off) and replace it with a SI050P to measure beams from 2.5-5mm. I would highly suggest that you also purchase the SIVS accessory. I have used our shearing interferometers personally for beams in this range, and the SIVS is very helpful for discerning the fringes. Thank you for your interest in our products!
Poster: nolan.real
Posted Date: 2008-05-06 11:24:16.0
trying to measure beams from 1-5mm. Do not understand what combination will allow this. will the si035 be able to measure up to 25.4mm with the different plates?
Poster: Tyler
Posted Date: 2008-03-13 08:33:19.0
Response from Tyler at Thorlabs: Dear tliu, thank you for interest in our product. The wedged plate in the interferometer is made from BK7 glass and as a result will absorb the 230 nm radiation. Please consider contacting our technical support department with your need; they can generate a quote for a custom interferometer made with a UV fused silica wedged plate.
Poster: tliu
Posted Date: 2008-03-13 05:41:03.0
Can this shearing Interferometer used for 230nm UV laser beam?
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Shearing Interferometers
Shear-Plate with Shearing Interferometer Base
Click to Enlarge

The Wedged Optical Flat is Held in Place with Three Magnets.
  • 5 Models Available for Beam Diameters Ranging from 1 - 50 mm
  • Qualitatively Determines Light Collimation
  • Magnetic Steel Balls Secure the Plate to the Base
  • Applicable Beam Diameters Engraved on Plate

These Shearing Interferometers can be used with incident beams as small as Ø1 mm and as large as Ø50 mm depending on which shear plate is used. The interference pattern is sensitive to the beam divergence and can be used to qualitatively determine whether the beam is collimated. As shown in the figure to the right, the plate has three steel balls fixated to the bottom of the plate, which attach magnetically to the base. This magnetic retention mechanism enables easy swapping of plates when different beam diameters are used. Please see the Specs tab for compatible plates and bases.

In addition, there is a hole drilled into the back of the base plate, thus enabling the light that is transmitted through the wedged optical flat to continue unimpeded. For all models except the SI500, this hole is SM1 threaded (1.035"-40). The SI500 output is a Ø2.95" (Ø75 mm) smooth bore. The base plate, diffuser plate, and shear plate come packaged in a carrying case.

Please note that due to the thickness of the shear plate optic in the SI100, SI254, and SI500, the back surface of the shear plate protrudes from the mounting plate as can be seen in the image to the right. Therefore, care should be taken when inserting or removing these plates from the base unit, especially if the SICP or SICPSM1 cage adapter plates are installed.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SI035 Support Documentation
SI035 Shearing Interferometer with a 1-3 mm Beam Diameter Shear Plate
$380.58
Today
SI050 Support Documentation
SI050 Shearing Interferometer with a 2.5-5 mm Beam Diameter Shear Plate
$391.61
Today
SI100 Support Documentation
SI100 Shearing Interferometer with a 5-10 mm Beam Diameter Shear Plate
$408.16
Today
SI254 Support Documentation
SI254 Shearing Interferometer with a 10-25.4 mm Beam Diameter Shear Plate
$435.74
Today
SI500 Support Documentation
SI500 Shearing Interferometer with a 25.4-50 mm Beam Diameter Shear Plate
$744.62
Today
Replacement Shear Plates
  5 Models Available for Beam Diameters Ranging from 1 mm to 50 mm
  Plates Compatible with Multiple Shearing Interferometer Bodies
  Magnetic Steel Balls Secure the Plate to the Base
  Applicable Beam Diameters Engraved on Plate

Thorlabs offers five interchangeable shear plates, which together are designed to be used with incident beam diameters ranging from 1 mm to 50 mm. The magnetically coupled kinematic design of these plates allows them to be precisely located on the shearing interferometer. Multiple plates are compatible with the same base (see the table below for compatibility), thus enabling the plate to be interchanged easily if the beam diameter being used for a particular experiment changes. Different shear plates are offered for different diameter beams due to the optimization of the wedge angle for the beam diameter.

Please note that due to the thickness of the shear plate optic in the SI100P, SI254P, and SI500P, the back surface of the shear plate protrudes from the mounting plate. Therefore, care should be taken when inserting or removing these plates from the base unit, especially if the SICP or SICPSM1 cage adapter plates are installed.

Item #Beam Diameter for Included PlateCompatible Shearing Interferometer Base Item #
SI035P 1 - 3 mm SI035, SI050, SI100, and SI254
SI050P 2.5 - 5 mm SI035, SI050, SI100, and SI254
SI100P 5 - 10 mm SI035, SI050, SI100, and SI254
SI254P 10 - 25.4 mm SI035, SI050, SI100, and SI254
SI500P 25.4 - 50 mm SI500
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SI035P Support Documentation
SI035P Shear Plate, 1-3 mm Beam Diameter
$137.90
Today
SI050P Support Documentation
SI050P Shear Plate, 2.5-5 mm Beam Diameter
$148.92
Today
SI100P Support Documentation
SI100P Shear Plate, 5-10 mm Beam Diameter
$164.39
Today
SI254P Support Documentation
SI254P Shear Plate, 10-25.4 mm Beam Diameter
$193.05
Today
SI500P Support Documentation
SI500P Shear Plate, 25.4-50 mm Beam Diameter
$358.52
Today
Beam Viewing Accessories
SITST Adapter Plate
  • Recommended for use with Beam Diameters from 1 mm to 10 mm
  • Increases the Size of Fringes on the Diffuser Plate

The SIVS accessory is helpful for viewing the fringe pattern created by a small diameter beam. By replacing the standard diffuser plate viewing screen on the SI035, SI050, SI100, or SI254a with this accessory, the size of the fringes will increase, thereby making it easier to determine if the light is collimated. The SIVS comes packaged with two 1/16" screws so that it can be secured to the shearing interferometer.

If desired, the mounting plate for the SIVS can be purchased separately (SITST). It features a standard Thorlabs SM1 (1.035"-40) thread, which is compatible with any of our SM1-threaded components.

Item #Compatible Shearing Interferometer Base Item #
SIVS SI035, SI050, SI100, and SI254a
SITST SI035, SI050, SI100, and SI254
  • The SIVS is designed for viewing the small fringes created by small-diameter beams. Although it is compatible with the SI254, it should not be necessary for viewing the fringes of the larger-diameter beams that the SI254 is intended for use with.
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SIVS Support Documentation
SIVS Magnified Viewing Screen System for Ø1-10 mm Beams
$275.78
Today
SITST Support Documentation
SITST Customer Inspired! SM1-Threaded Mounting Plate for use with Shearing Interferometers
$55.16
Today
30 mm Cage Adapter Plates
SICP Exploded View
Click to Enlarge
The SICP cage system adapter replaces the diffuser plate included with the shearing interferometer and can be secured using the two 4-40 screws.
  • Integrate a Shearing Interferometer into a 30 mm Cage System
  • Replaces the Standard Diffuser Plate Viewing Screen Provided with the Shearing Interferometers
  • Two Versions Available:
    • Integrated Diffuser Plate
    • Integrated SM1-Threaded Viewing Plate

These two adapter plates are designed to replace the standard diffuser plate viewing screen on the SI035, SI050, SI100, or SI254 and enable the input side of the shearing interferometer to be attached to a 30 mm cage or SM1 lens tube system. The SICP offers a diffuser for viewing the fringes. The SICPSM1 has an SM1-threaded bore, allowing a Ø1" lens tube such as the one included with the SIVS magnified viewing screen (above) to be attached where the fringes would normally be viewed.

Since these plates feature tapped 4-40 holes for attaching the cage system, the plate cannot be attached to an existing cage system. The ERSCA cage rod adapters will allow this plate to be inserted and removed without having to disassemble the cage system.

Item #Compatible Shearing Interferometer Base Item #
SICP SI035, SI050, SI100, and SI254
SICPSM1 SI035, SI050, SI100, and SI254
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SICP Support Documentation
SICP 30 mm Cage System Adapter for Shearing Interferometers with Diffuser Viewing Screen
$68.25
Today
SICPSM1 Support Documentation
SICPSM1 30 mm Cage System Adapter for Shearing Interferometers with SM1-Threaded Viewing Port
$63.00
Today
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Last Edited: Sep 05, 2013 Author: Sean Harrell