1. An optical device, comprising:
a plurality of optical modulators that modulates a plurality of color lights for each color light in accordance with image information;
a color combining optical system having a light-irradiation side and a plurality of light-incident sides each opposing an image formation area of each optical modulator, the color combining optical system combining and irradiating the color lights modulated by the respective optical modulators through the light-irradiation side; and
a projection optical system that enlarges and projects on optical image formed by the color combining optical system,
a central axis of each light-incident side of the color combining optical system being located at a position shifted relative to a central axis of the image formation area of the respective optical modulator, and
an optical axis of the projection optical system being located at a position shifted relative to a central axis of the light-irradiation side of the color combining optical system,
such that when the optical axis of the projection optical system, the central axis of at least one of the light-incident sides of the color combining optical system and the central axis of the image formation area of the respective optical modulator are projected on a plane parallel to the light-irradiation side of the color combining optical system, the central axis of the at least one of the light-incident sides of the color combining optical system is located between the optical axis of the projection optical system and the central axis of the image formation area of the respective optical modulator.
2. The optical device according to claim 1, the distance between the central axis of the image formation area of each optical modulator and the central axis of each respective light-incident side of the color combining optical system being determined based on an illumination ratio of a projection optical system.
3. The optical device according to claim 2, a relationship of:
\u03b4
\u2267
NA
(
d
+
d
p
n
2
\u2061
(
1
+
NA
2
)
–
NA
2
)
\u2062
(
1
–
R
)
2
being established, where the distance between the central axis of the image formation area of each optical modulator and the central axis of each respective light-incident side of the color combining optical system is \u03b4, the illumination ratio of the projection optical system is R, a numerical aperture around the center of the projection optical system is NA, a refractive index of the color combining optical system is n, the length of the color combining optical system along the central axis of the light incident thereon is dp, and the distance between the optical modulator and the color combining optical system is d.
4. A projector comprising:
a plurality of optical modulators that modulates a plurality of color lights for each color light in accordance with image information;
a color combining optical system having a light-irradiation side and a plurality of light-incident sides each opposing an image formation area of each optical modulator, the color combining optical system combining and irradiating the color lights modulated by the respective optical modulators through the light-irradiation side; and
a projection optical system that enlarges and projects an optical image formed by the color combining optical system,
a central axis of each light-incident side of the color combining optical system being located at a position shifted relative to a central axis of the image formation area of the respective optical modulator, and
an optical axis of the projection optical system being located at a position shifted relative to a central axis of the light-irradiation side of the color combining optical system,
such that when the optical axis of the projection optical system, the central axis of at least one of the light-incident sides of the color combining optical system and the central axis of the image formation area of the respective optical modulator are projected on a plane parallel to the light-irradiation side of the color combining optical system, a central axis of at least one of the light-incident sides of the color combining optical system is located between the optical axis of the projection optical system and the central axis of the image formation area the respective optical modulator.
5. The projector according to claim 4,
the distance between the central axis of the light incident on each optical modulator and the central axis of each respective light-incident side of the color combining optical system being determined based on an illumination ratio of a projection optical system.
6. The projector according to claim 5,
a relationship of:
\u03b4
\u2267
NA
(
d
+
d
p
n
2
\u2061
(
1
+
NA
2
)
–
NA
2
)
\u2062
(
1
–
R
)
2
being established, where the distance between the central axis of the light incident on each optical modulator and the central axis of each respective light-incident side of the color combining optical system is \u03b4, the illumination ratio of the projection optical system is R, a numerical aperture around the center of the projection optical system is NA, a refractive index of the color combining optical system is n, the length of the color combining optical system along the central axis of the light incident thereon is dp, and the distance between the optical modulator and the color combining optical system is d.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A disc storage case characterized in that the case is formed by connecting together in one body two substantially triangular case members, each of which has an opened portion and plural partition plates, at their respective one end portion so that the case members can be opened and closed freely.
2. A disc storage case according to claim 1, wherein the case is provided with disc storage chambers formed of substantially triangular partition plates provided at predetermined intervals, and continuous front wall surfaces provided at front surface portions of the partition plates; and formed so that the disc storage chambers of one case member alternate in a superposed state on those of the other when the case members are closed, a continuous integral connecting portion of a plastic being formed at upper end portions of the front wall surfaces, whereby the case members can be opened and closed freely via the connecting portion as a fulcrum.
3. A disc storage case according to claim 1, wherein the case is provided with disc storage chambers formed of substantially triangular partition plates provided at predetermined intervals, and continuous front wall surfaces provided at front surface portions of the partition plates; and formed so that the disc storage chambers of one case member alternate in a superposed state with those of the other when the case members are closed, a hinge-carrying continuous integral connecting portion being formed at upper end portions of the front wall surfaces, whereby the case members can be opened and closed freely via the connecting portion as a fulcrum.