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Proceedings Paper

F-sin(theta) lens system and applications
Author(s): Simon Thibault
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Paper Abstract

Introducing the desired amount of distortion in an optical system is possible and relatively straight forward for optical designer. Known f-theta lenses used in laser scanner system is one of the most popular lenses of this type. With the development of DWDM system, compact spectrometer and various grating based devices, the interest in solving optical problems with innovative optical design has been a revival. On the other hand, it is possible to simplify considerably the task of the software by designing more sophisticated optical element. The F-sin(theta) lens is such a device which can be used in various grating based devices to improve the performance. This optical device is intended to provide a new lens or lens group which can be used with a diffraction grating to provide a linear output plane with the wavelength (lambda), but also with the order of diffraction (m), or with the grating spatial frequency, or with the inverse of the index of refraction (1/n). Based on theoretical consideration, we calculated which amount of distortion is desired to get linear output plane for a grating based device. We present singlet, achromatic doublet and mirror having this characteristic. These F-sin(theta) lenses present satisfactory distortion characteristic and have an improved correction for the curvature of image plane. F-sin(theta) lens will be also name F-lambda lens.

Paper Details

Date Published: 5 December 2001
PDF: 8 pages
Proc. SPIE 4441, Current Developments in Lens Design and Optical Engineering II, (5 December 2001); doi: 10.1117/12.449556
Show Author Affiliations
Simon Thibault, Institut National d'Optique (Canada)

Published in SPIE Proceedings Vol. 4441:
Current Developments in Lens Design and Optical Engineering II
Iain A. Neil; Robert E. Fischer; Takanori Yamanashi; R. Barry Johnson; Warren J. Smith, Editor(s)

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