&lt;title&gt;Diamond Turning Of Infrared Optics&lt;/title&gt;

Benjamin, R. J.; Ulph, Eric

doi:10.1117/12.932739

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Design Operation and Calibration Of The Roc1

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2008

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“…The disc surfaces were first black anodized and then the front surface was diamond-turned to produce a highly reflective surface to minimize the amount of absorbed radiation. A fresh diamond-turned aluminum surface has very similar reflectivity to vacuum-deposited aluminum (greater than 95 % at 1.06 μm) [ 5 ]. It’s important to choose the proper material for constructing the ROC to minimize the grating effect (i.e., multiple reflected beams) from the grooves produced on the diamond-turned surface at the laser wavelength to be used.…”

Section: Design Operation and Calibration Of The Rocmentioning

confidence: 99%

Reflective Optical Chopper Used in NIST High-Power Laser Measurements

Li¹,

Scott²,

Cromer³

et al. 2008

J. Res. Natl. Inst. Stand. Technol.

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For the past ten years, NIST has used high-reflectivity, optical choppers as beamsplitters and attenuators when calibrating the absolute responsivity and response linearity of detectors used with high-power CW lasers. The chopper-based technique has several advantages over the use of wedge-shaped transparent materials (usually crystals) often used as beam splitters in this type of measurement system. We describe the design, operation and calibration of these choppers. A comparison between choppers and transparent wedge beampslitters is also discussed.

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Section: Design Operation and Calibration Of The Rocmentioning

confidence: 99%