Patent
Diffraction optical element
Kenzaburo Suzuki,Yoshibumi Tokiyoda,常世田 義文,鈴木 憲三郎 +3 more
- 04 Oct 2002
24
TL;DR: In this paper, a multi-ply diffraction optical element which has improved angular characteristic is provided, and a diffraction grating groove is formed on the combined surface between both of the diffraction element parts.
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Abstract: PROBLEM TO BE SOLVED: To provide a multi-ply diffraction optical element which has improved angular characteristic SOLUTION: In the diffraction optical element, a first diffraction element part 6 and a second diffraction element part 7 consisting of different material to each other are bonded tightly to each other and a diffraction grating groove 1 having a prescribed shape is formed on the combined surface between both of the diffraction element parts 6, 7 A light shielding film 5a is formed on a wall 3 of the diffraction grating groove 1, incident light is shielded and the occurrence of flare is suppressed COPYRIGHT: (C)2004,JPO
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Citations
Patent
Confocal measurement device
Hayakawa Masayuki,Yoshihiro Yamashita +1 more
- 17 Jan 2013
TL;DR: In this paper, a confocal measurement device (100) for multipoint measurement of displacement of a measurement object (200) using a confococal optical system is presented, in which axial chromatic aberration has been generated, onto the measurement object using a plurality of heat units.
37
Patent
Diffractive optical element, optical system, and optical apparatus
Reona Ushigome
- 10 Jun 2011
TL;DR: A diffractive optical element includes a first diffraction and a second diffraction grating which are made of materials different from each other and are stacked in an optical axis direction.
26
Patent
Laminated diffractive optical element and optical system
Kenichi Saito,Kazutaka Inoguchi +1 more
- 05 Oct 2010
TL;DR: The laminated diffractive optical element includes plural diffraction gratings 21, 22 and 23 laminated with each other, the respective gratings being formed of a same light-transmissive material as mentioned in this paper.
16
Patent
Diffractive optical element and method of fabricating diffractive optical element
Kenzaburo Suzuki
- 28 Mar 2006
TL;DR: In this paper, a diffractive optical element in which mutually different materials make contact with one another via the same diffraction grating groove was introduced, where one is a first ultraviolet curing resin and the other is a second UV curing resin that is different from the first one.
15
Patent
Diffractive optical device, optical system using the diffractive optical device and method for manufacturing diffractive optical device
Satoshi Hayakawa
- 07 Jun 2007
TL;DR: A diffractive optical device as discussed by the authors is composed of resins of different materials, and has a laminated structure, in which a second diffractive device element 20 is bonded between a first diffractive element element 10 and a third diffractive object element 30.
12
References
Patent
Diffractive optical element and optical system having the same
Takehiko Nakai
- 27 Jul 1998
TL;DR: A diffractive optical element includes a plurality of laminated diffraction grating surfaces as discussed by the authors, each of which is formed to have a sufficiently small grating thickness as compared with a grating pitch thereof.
227
Patent
Diffractive optical element
Hiroyuki Ishii
- 18 Jan 2000
TL;DR: A diffractive optical element has a plurality of step-like patterns each having surface levels of a number less than eight, the steplike patterns being disposed in combination to provide a function of a steplike structure of eight or more levels.
105
Patent
Apparatus and method for the reduction of polarization sensitivity in diffraction gratings used in fiber optic communications devices
Andrew D. Sappey
- 06 Apr 2001
TL;DR: In this article, a method of making a reflective diffraction grating includes forming a plurality of grooves in a substrate, the grooves having a reflective surface for reflecting an incident beam and not on the non-reflective surface.
26
Patent
Manufacture of digital blazed diffraction grating
Hiroshi Kawada,Takeo Otsuka,武夫 大塚,浩志 河田 +3 more
- 28 Jul 1998
TL;DR: In this paper, a manufacturing method of diffraction grating in which no wall-shaped projection is caused was proposed. But the manufacturing method is not suitable for high-dimensional diffraction.
6
Patent
Diffraction optical device and optical system having the same, photographing device and observation device
Fujimoto Makoto
- 15 Feb 2002
TL;DR: In this paper, a light-shielding means is formed which shields the light entering the edge part of a diffraction grating or the light exiting from the edge of the grating.
6
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