Optical element having a plurality of decentered reflecting curved surfaces, and optical instrument including the same
First Claim
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1. An optical element of transparent optical material, said optical element comprising:
- an incident surface into which light enters;
a plurality of reflecting surfaces on which the light entered from said incident surface is reflected in order; and
an emergent surface from which the light reflected from said plurality of reflecting surfaces is emitted, wherein at least one of said incident surface and said emergent surface is coated with an antireflection film, and at least one surface of said incident surface, said plurality of reflecting surfaces, and said emergent surface is a rotationally asymmetric aspherical surface having only one plane of symmetry.
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Abstract
An integrally formed optical element includes an incident surface into which light flux from an object enters, a plurality of reflecting curved surfaces decentered one to the other from which the light flux entered from the incident surface is reflected and an emergent surface from which the light flux from the reflecting curved surfaces is emitted, wherein an antireflection film is applied onto the incident surface and the emergent surface, and wherein the light flux emitted from the emergent surface forms an image.
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Citations
4 Claims
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1. An optical element of transparent optical material, said optical element comprising:
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an incident surface into which light enters;
a plurality of reflecting surfaces on which the light entered from said incident surface is reflected in order; and
an emergent surface from which the light reflected from said plurality of reflecting surfaces is emitted, wherein at least one of said incident surface and said emergent surface is coated with an antireflection film, and at least one surface of said incident surface, said plurality of reflecting surfaces, and said emergent surface is a rotationally asymmetric aspherical surface having only one plane of symmetry. - View Dependent Claims (2)
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3. An image pick-up device comprising:
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(1) a photographicing optical system having an optical element of transparent optical material, said optical element comprising;
(a) an incident surface into which light enters;
(b) a plurality of reflecting surfaces on which the light entered from said incident surface is reflected in order; and
(c) an emergent surface from which the light reflected from said plurality of reflecting surfaces is emmitted, wherein at least one of said incident surface and said emergent surface is coated with an antireflection film, and wherein at least one surface of said incident surface, said plurality of reflecting surfaces, and said emergent surface is a rotationally asymmetric aspherical surface having only one plane of symmetry, and (2) an image pick-up device for receiving an image formed by said photographing optical system. - View Dependent Claims (4)
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Specification