Study on convex grating in hyperspectral imaging spectrometers

Quan Liu; Yiqun Ji; Jianhong Wu; Weimin Shen

doi:10.1117/12.833724

30 October 2009 Study on convex grating in hyperspectral imaging spectrometers

Quan Liu, Yiqun Ji, Jianhong Wu, Weimin Shen

Proceedings Volume 7494, MIPPR 2009: Multispectral Image Acquisition and Processing; 74940N (2009) https://doi.org/10.1117/12.833724
Event: Sixth International Symposium on Multispectral Image Processing and Pattern Recognition, 2009, Yichang, China

Abstract

The convex grating is one of the key elements in Offner hyperspectral imaging spectrometers. In this paper the design of the holographic convex grating focuses on the optimization of its recording parameters for aberration correction. Meantime, the diffraction efficiency of the convex grating is discussed by using rigorous coupled-wave theory. The results show: within the wavelength range from 0.4μm to 0.78μm, the diffraction efficiency can be over 20% and up to 40% through controlling the groove depth and duty cycle of rectangular grating; the diffraction efficiency can be over 35% through controlling the blaze degree of the blazed grating. The rectangular surface-relief convex grating with the period of 5μm in the center, and the ruled area - a convex with its radius 100mm and aperture 40mm has been fabricated by holographic-ion beam etching. A prototype blazed convex grating will be fabricated in late 2010.

Citation Download Citation

Quan Liu, Yiqun Ji, Jianhong Wu, and Weimin Shen "Study on convex grating in hyperspectral imaging spectrometers", Proc. SPIE 7494, MIPPR 2009: Multispectral Image Acquisition and Processing, 74940N (30 October 2009); https://doi.org/10.1117/12.833724

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available