Fabrication of continuous surface-relief gratings using a high-precision diamond-cutting process

Jun Amako; Hitoshi Nakao; Shinichiro Ochiai

doi:10.1117/1.1370386

1 August 2001 Fabrication of continuous surface-relief gratings using a high-precision diamond-cutting process

Jun Amako, Hitoshi Nakao, Shinichiro Ochiai

Optical Engineering, Vol. 40, Issue 8, (August 2001). https://doi.org/10.1117/1.1370386

Direct fabrication of continuous surface-relief gratings on acrylics using a high-precision diamond-cutting process is reported. Critical conditions such as the diamond-tip radius and cutting step were selected by taking account of a designed grating profile and an expected roughness on the obtained grating surface. Experimental results for a 13-fanout continuous phase grating are presented. The phase profile was optimized using a stochastic design algorithm. A 3-mm-thick acrylic plate was carved into a grating that provided a measured efficiency of 85% with Fresnel reflection losses uncorrected. The diffracted intensity distribution was rather sensitive to any departure from the designed profile, the 0th-order intensity being particularly affected. Compensating the material's springback was found critical to the grating's performance.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Jun Amako, Hitoshi Nakao, and Shinichiro Ochiai "Fabrication of continuous surface-relief gratings using a high-precision diamond-cutting process," Optical Engineering 40(8), (1 August 2001). https://doi.org/10.1117/1.1370386

Published: 1 August 2001

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KEYWORDS

Error analysis

Diffraction gratings

Diffraction

Optical design

Reflection

Optical engineering

Refractive index

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