Optical device and virtual image display apparatus
First Claim
1. An optical device comprising:
- a first substrate;
a first reflective face that is disposed on one surface of the first substrate;
a second substrate that is made of a transmissive material; and
a partially transmissive reflective face that is disposed on one surface of the second substrate,wherein the first reflective face is disposed to be spaced apart from the partially transmissive reflective face, in parallel with the partially transmissive reflective face,wherein a refractive index of the second substrate is higher than a refractive index of a section between the first reflective face and the partially transmissive reflective face which are spaced apart, andwherein light incident into the section between the first reflective face and the partially transmissive reflective face which are spaced apart is repeatedly reflected between the first reflective face and the partially transmissive reflective face, and at least a part of the light is transmitted through the partially transmissive reflective face and incident onto the second substrate, and is emitted as outgoing light from a surface different from a surface on which the partially transmissive reflective face of the second substrate is provided.
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Accused Products
Abstract
A partially transmissive reflective film is provided on a second transparent substrate, and a reflector is provided on a first transparent substrate. The partially transmissive reflective film and the reflector are held parallel to each other with a predetermined spacing therebetween. Thereby, light is incident from a protrusion portion on which the reflector of the first transparent substrate is formed, the light is reflected by the partially transmissive reflective film and the reflector, and the incident light is guided by an air layer between the partially transmissive reflective film and the reflector. A refractive index of the air layer is lower than that of the second transparent substrate. A part of the guided light is extracted from the partially transmissive reflective film, and is emitted from the second transparent substrate on a side opposite to a surface on which the partially transmissive reflective film is provided.
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Citations
20 Claims
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1. An optical device comprising:
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a first substrate; a first reflective face that is disposed on one surface of the first substrate; a second substrate that is made of a transmissive material; and a partially transmissive reflective face that is disposed on one surface of the second substrate, wherein the first reflective face is disposed to be spaced apart from the partially transmissive reflective face, in parallel with the partially transmissive reflective face, wherein a refractive index of the second substrate is higher than a refractive index of a section between the first reflective face and the partially transmissive reflective face which are spaced apart, and wherein light incident into the section between the first reflective face and the partially transmissive reflective face which are spaced apart is repeatedly reflected between the first reflective face and the partially transmissive reflective face, and at least a part of the light is transmitted through the partially transmissive reflective face and incident onto the second substrate, and is emitted as outgoing light from a surface different from a surface on which the partially transmissive reflective face of the second substrate is provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification