Patent
Diffractive Optical Element and Endoscope
Masahiro Katakura
- 02 Oct 2012
3
TL;DR: In this article, a diffractive optical element is formed by laminating two optical material layers formed of different energy-cured resins; in which a relief pattern is formed at the interface between the two optical materials layers; and that satisfies the following conditional expressions: 0.01<d 2 /d 1<0.
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Abstract: Provided is a diffractive optical element that is formed by laminating two optical material layers formed of different energy-cured resins; in which a relief pattern is formed at the interface between the two optical material layers; and that satisfies the following conditional expressions: 0.01<d 2 /d 1<0.2 (1) 0.05<d 1 /φE<1.0 (2) 0.0005<d 2 /φE<0.1 (3) wherein d1 is the center plate thickness (mm) of one optical material layer 2 that is cured first, d2 is the center plate thickness (mm) of the other optical material layer 3 that is cured later, and φE is the effective diameter (mm) of the relief pattern 4.
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Citations
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TL;DR: A depiction system for generating a real time correlated depiction of movements of a surgical tool for uses in minimally invasive surgery is described in this paper, which includes a computer system, 3D surface data generation and position data generation means for obtaining real time spatial position data of at least a part of the surgical tool.
References
Patent
Diffraction optical element
Takehiko Nakai
- 27 Jul 2000
TL;DR: In this paper, a diffraction optical element with a plurality of diffraction gratings and the maximum difference of length among optical paths of light passing through the plurality of gratins is integer multiples of a plurality-of- wavelengths is described.
34
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
Laminated diffractive optical element and resin composition therefor
Hidefumi Iwasa
- 20 Jan 2009
TL;DR: In this paper, a resin composition includes a binder component having at least one of a monomer and an oligomer of one or more of a fluorine system and a silicone system having a polymerizable functional group in a molecule.
14
Patent
Diffractive optical element, optical system and optical apparatus
Hiroto Yasui
- 05 Oct 2007
TL;DR: The diffractive optical element includes two diffraction gratings made of different materials and being in contact with each other at their grating surfaces as discussed by the authors, and the second material is obtained by mixing a resin material with a particulate material satisfying the following conditions: nd1≧1.213E−05×νd2 2 −5.6, νd2≦30, θg, F1≦(−1.675)
11
Patent
Diffraction optical element and optical system using the same
Hiroto Yasui,裕人 安井 +1 more
- 29 Mar 2007
TL;DR: In this paper, a diffraction optical element has a structure in which a first diffraction grating made of a first material and a second one made of another material are stacked so that diffraction surfaces of diffraction parts of respective diffraction gratings are in contact with each other.
10
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