Optical device and HMD using said optical device
First Claim
1. An optical device including:
- a first polarizer plate disposed at an incident side;
a second polarizer plate disposed at an outgoing side; and
a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress, and wherein the optical components are coated on one side with an anti-reflection coating.
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Accused Products
Abstract
This invention is directed to provide a head-mounted display device (HMD) which is capable of providing a high-quality and impressive image with an improved S/N ratio through a super-wide-field-angle short-focus lens for obtaining wide-field-angle visual information. An optical device used for the HMD according to the present invention comprise: a reflecting and refracting means is made of copolymerized high-polymer material having positive and negative photoelastic coefficients against an internal stress; a first and second quarter-wave plates have refractive indexes in the direction of their thickness, which values are within the range from the minimal value and a maximal value of refractive indexes of respective quarter-wave plates; the quarter-wave plates are disposed so that their extension axes intersect each other at a right angle; first and second wideband-wave plates, each of which is prepared by bonding a half-wave plate to a quarter-wave plate at a suitable angle, are further provided; and optical elements are covered at their surfaces with anti-reflection coating or bonded to each other with optical adhesive.
68 Citations
24 Claims
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1. An optical device including:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress, and wherein the optical components are coated on one side with an anti-reflection coating. - View Dependent Claims (4, 5)
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2. An optical device including:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter-wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate have refractive indicies in a thickness direction thereof and said refractive indicies lie between a minimal value and a maximal value of the refractive indices in a surface plane direction of the quarter wave-plates, and wherein the optical components are coated on one side with an anti-reflection coating.
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3. An optical device including:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate are disposed with stretch-giving axes thereof being normal to each other, and wherein the optical components are coated on one side with an anti-reflection coating.
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6. An optical device comprising:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first wide-band-wave plate, a half-mirror, and a second wide-band-wave plate disposed between the first and second polarizer plates, wherein the first wide-band-wave plate and the second wide-band-wave plate are each prepared from a quarter-wave plate and a half-wave plate with intersecting optical axes, bonded together. - View Dependent Claims (8, 9, 10, 17, 18)
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7. An optical device comprising:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first wide-band-wave plate, a half-mirror, and a second wide-band-wave plate disposed between the first and second polarizing plates, wherein the first wide-band-wave plate and the second wide-band-wave plate are each prepared from a quarter-wave plate and a half-wave plate with intersecting optical axes, bonded together and made of the same material, and wherein at least one of wave-plates satisfies a condition nx >
nz >
ny, where nx, nz and ny are refractive indicies in orthogonal directions and a thickness direction, respectively, in a plane of the wave-plate.
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11. An optical device including:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress, and wherein one pair of the optical components is bonded together with an adhesive for optics.
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12. A head-mounted display device comprising:
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an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress; an illuminating device; and a liquid crystal display. - View Dependent Claims (13, 14)
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15. A head-mounted display device comprising:
an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress, and an electroluminescent display. - View Dependent Claims (16)
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19. An optical device including:
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a first polarizer plate disposed at an incident side; a second polarizer plate disposed at an outgoing side; and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter-wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate have refractive indicies in a thickness direction thereof and said refractive indicies lie between a minimal value and a maximal value of the refractive indices in a surface plane direction of the quarter wave-plates, and wherein one pair of the optical components is bonded together with an adhesive for optics.
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20. A head-mounted display device, comprising:
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an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter-wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate have refractive indicies in a thickness direction thereof and said refractive indicies lie between a minimal value and a maximal value of the refractive indices in a surface plane direction of the quarter wave-plates; an illuminating device; and a liquid crystal display.
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21. A head-mounted display device, comprising:
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an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter-wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate have refractive indicies in a thickness direction thereof and said refractive indicies lie between a minimal value and a maximal value of the refractive indices in a surface plane direction of the quarter wave-plates, and wherein the reflecting-refracting device is prepared from a copolymer of high-molecular compounds having positive and negative photoelastic coefficients with respect to an inner stress; and an electroluminescent display.
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22. An optical device including:
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a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate are disposed with stretch-giving axes thereof being normal to each other, and wherein the optical components are coated on one side with an anti-reflection coating, wherein one pair of the optical components is bonded together with an adhesive for optics.
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23. A head-mounted display device, comprising:
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an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate are disposed with stretch-giving axes thereof being normal to each other, and wherein the optical components are coated on one side with an anti-reflection coating; an illuminating device; and a liquid crystal display.
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24. A head-mounted display device, comprising:
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an optical device including, a first polarizer plate disposed at an incident side, a second polarizer plate disposed at an outgoing side, and a half-mirror-coated reflecting-refracting device, a first quarter-wave plate, a half-mirror, and a second quarter wave plate disposed between the first and second polarizer plates, wherein the first quarter-wave plate and the second quarter-wave plate are disposed with stretch-giving axes thereof being normal to each other, and wherein the optical components are coated on one side with an anti-reflection coating; and an electroluminescent display.
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Specification