Optical device and HMD using said optical device

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 optical components are coated on one side with an anti-reflection coating.

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 optical device comprising:

• 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.

An optical device comprising:

• 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 n.sub.x >n.sub.z >n.sub.y, where n.sub.x, n.sub.z and n.sub.y are refractive indicies in orthogonal directions and a thickness direction, respectively, in a plane of the wave-plate.

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 one pair of the optical components is bonded together with an adhesive for optics.

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;
• an illuminating device;
• and
• a liquid crystal display.

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.

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 one pair of the optical components is bonded together with an adhesive for optics.

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 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.

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 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.

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 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.

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 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.