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Featured Products

Axicon Centering Station

Axicon Centering Station

Optical Perspectives Group introduces the Axicon Centering Station for PSM Point Source Microscope

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MicroFinish Topographer

MicroFinish Topographer

Universal Surface Roughness Measurement

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Point Source Microscope

Point Source Microscope

PSM Point Source Microscope

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CaliBall I & II

CaliBall I & II

CaliBall, a calibration artifact using the Random Ball Test

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New Products

Right Angle Adapter Accessory for PSM

Right Angle Adapter Accessory for PSM

The Right Angle Adapter (RAA) is an attachment for the Point Source Microscope (PSM) that adds flexibility to the PSM by allowing the objective to be attached at right angles to the axis of the PSM.

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Set of 10 balls for use with the PSM

Set of 10 balls for use with the PSM

Precision balls for use with the PSM for alignment and assembly of optical systems.

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“C” mount Objective Adapter

“C” mount Objective Adapter

The “C” mount has 1”-32 TPI and fits many Edmund Optics lens tubes and fittings.

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RMS Objective Adapter

RMS Objective Adapter

The RMS used to be “the” standard with 0.800”-36 TPI.

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Thorlabs SM1 Objective Adapter

Thorlabs SM1 Objective Adapter

The Thorlabs SM1 adapter with 1.035-40 TPI fits many Thorlabs SM1 lens tubes.

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Mitutoyo Objective Adapter

Mitutoyo Objective Adapter

The Mitutoyo adapter with M26x36 TPI fits their long working distance objectives. 

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Calibration Package for PSM

Calibration Package for PSM

OPG offers a NIST traceable square wave grating with 4 lp/mm spacing for use in calibrating the lateral scale of the PSM and other optical instruments.

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Calibration Package for PSM Angular Measurement

Calibration Package for PSM Angular Measurement

OPG offers a PTB traceable 1” diameter window with an approximate 30 arc minute wedge measured for exact value to better than 1 arc second on a Trioptics PrismMaster and a Certificate of that measurement.

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News

  • Instructions for Using PSM2

    Instructions for Using PSM2

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  • Axicon Centering Station Announcement

    Axicon Centering Station Announcement

    OPG has stopped offering a centering station using a rotary table to establish an axis in space to which to align optical system. Rather we now offer a centering station that uses an Axicon grating to create the axis.

    Read more

  • Videos from The Optical Society

    Videos from The Optical Society

    The Optical Society offered Robert (Bob) Parks an opportunity to share his stories of excitement and inspiration in a couple of short videos.

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  • News announcement about what is happening in 2018 for OPG

    For the last three years Optical Perspectives Group, LLC (OPG) had a licensing agreement with Trioptics-USA to manufacture and sell OPG products exclusively world-wide.

    Read more

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A Contemporary Version of the Autostigmatic Microscope and Its Uses

OUTLINE

What is an autostigmatic microscope (ASM)

Measuring the radius of curvature of a concave surface
– Main historical use

Modern version of an ASM uses internal infinite conjugate optics

Use of an ASM for alignment of optical systems

Other uses of an ASM

Conclusions

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Downloads

  • SPREADSHEET FROM APPLIED OPTICS PAPER:

     

    "Measuring the four paraxial lens parameters using an autostigmatic microscope"

     

    DOWNLOAD HERE

  • BIBLIOGRAPHY OF DOWNLOADABLE PAPERS

     

    You must register and log in to access the Bibliography of Downloadable Papers.

    DOWNLOAD HERE

Case Studies & Testimonials

  • How small can the PSM be used for centering on a cylindrical axis?

    The PSM is an ideal tool for finding the center of curvature of a ball or the axis of a cylinder. The question is for how small a ball or cylinder can the PSM do this?

    The smallest article that was readily available was a piece of monofilament 8 pound test fishing line that was 290 μm in diameter. There was no problem finding the axis of the fishline, and separating the Cat’s eye reflection from the surface from the confocal reflection of the axis. The experiment was done with a 5x objective, and the result would have been even more definitive using a 10x objective.

  • Why is proper alignment so important?

    Here is a case of a very happy customer due to better optics.

    A few days ago an astronomer friend of mine commented that he had gotten the optics of his telescope improved and the improvement reduced the time it took to get data by a factor of 3. For an astronomer this is a dramatic improvement since observing time on large telescopes can cost thousands of dollars an hour.

    My friend did not say how the optics had been improved, but the important point is that better optics, whether due to figure errors, mounting or alignment mean more productive optics. I generally think of better optics as a better product leaving the manufacturing facility without thinking about how much the better optics mean to the productivity of the customer.

OPG Customers