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1. WO2021030277 - SMALL FORM FACTOR 4-MIRROR BASED IMAGING SYSTEMS

Publication Number WO/2021/030277
Publication Date 18.02.2021
International Application No. PCT/US2020/045639
International Filing Date 10.08.2020
IPC
G02B 11/20 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
11Optical objectives characterised by the total number of simple and compound lenses forming the objective and their arrangement
20having four lenses only
CPC
G02B 17/023
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
17Systems with reflecting surfaces, with or without refracting elements
02Catoptric systems, e.g. image erecting and reversing system
023for extending or folding an optical path, e.g. delay lines
G02B 17/0657
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
17Systems with reflecting surfaces, with or without refracting elements
02Catoptric systems, e.g. image erecting and reversing system
06using mirrors only ; , i.e. having only one curved mirror
0647using more than three curved mirrors
0657off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry
Applicants
  • CHOI, Youngwan [KR]/[US]
Inventors
  • CHOI, Youngwan
Agents
  • MALLON, Joseph J.
Priority Data
62/885,29611.08.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SMALL FORM FACTOR 4-MIRROR BASED IMAGING SYSTEMS
(FR) SYSTÈMES D'IMAGERIE À BASE DE QUATRE MIROIRS À FAIBLE FACTEUR DE FORME
Abstract
(EN)
An all-reflective optical system is described including a concave primary mirror having a central aperture and a radius, the primary mirror having one of a parabolic, non-parabolic conical, or aspherical surface, a convex secondary mirror facing the primary mirror, the secondary mirror having an aspherical surface, where an optical axis extends from a vertex of the primary mirror to a vertex of the secondary mirror, a concave tertiary mirror arranged behind the primary mirror, the tertiary mirror having one of a parabolic, non-parabolic conical or aspherical surface, a concave quaternary mirror arranged in the central aperture of the primary mirror or behind the primary mirror, the quaternary mirror having one of a spherical, parabolic, non-parabolic conical or aspherical surface, and at least one image plane having one or more aggregated sensors, wherein the image plane is positioned at a radial distance from the optical axis that is no more than the radius of the primary mirror.
(FR)
L'invention concerne un système optique tout réfléchissant comprenant un miroir primaire concave ayant une ouverture centrale et un rayon, le miroir primaire ayant l'un d'un réflecteur parabolique, de forme conique non parabolique, ou surface asphérique, un miroir secondaire convexe faisant face au miroir primaire, le miroir secondaire ayant une surface asphérique, un axe optique s'étendant d'un sommet du miroir primaire à un sommet du miroir secondaire, un miroir tertiaire concave disposé derrière le miroir primaire, le miroir tertiaire ayant l'un d'un réflecteur parabolique, surface asphérique ou asphérique non parabolique, un miroir quaternaire concave disposé dans l'ouverture centrale du miroir primaire ou derrière le miroir primaire, le miroir quaternaire ayant l'une d'une sphère, parabolique, surface asphérique ou asphérique non parabolique, et au moins un plan d'image ayant un ou plusieurs capteurs agrégés, le plan d'image étant positionné à une distance radiale de l'axe optique qui n'est pas supérieure au rayon du miroir primaire.
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