Projection type of image displaying apparatus
AssigneeKonica Minolta Opto, Inc.
InventorsSatoshi Onishi, Shinichi Suzuki, Atsushi Matsuura
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Abstract
A projection type of image displaying apparatus, comprising: a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system having at least three curved mirrors; and a variable aperture mechanism disposed between a first curved mirror from the image forming element and a second curved mirror in the projection optical system, the variable mechanism entering and retreating a light shielding plate with respect to a projection light path to vary the light intensity of the image light.
Claims28
A projection type of image displaying apparatus, comprising:
- a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system having at least three curved mirrors;
- and
- a variable aperture mechanism disposed between a first curved mirror and a second curved mirror from the image forming element side in the projection optical system, the variable mechanism entering and retreating a light shielding plate with respect to a projection light path to vary the light intensity of the image light.
A projection type of image displaying apparatus, comprising:
- a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system having at least three curved mirrors;
- and
- a variable mechanism for entering and retreating a light shielding plate with respect to a projection light path to vary the light intensity of the image light, the light shielding plate being entered from a space between a light flux entering any one of the at least three curved mirrors and a light flux reflecting on the curved mirror concerned or a lateral space of a plane formed by a reference axis entering any one of the at least three curved mirrors and a reference axis reflecting on the curved mirror concerned.
A projection type of image displaying apparatus, comprising:
- a projection optical unit, the projection optical unit comprising a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system having at least two curved mirrors;
- and
- a variable aperture mechanism, the variable aperture mechanism being mounted and dismounted in a direction substantially perpendicular to a reference plane formed by a projection reference axis between the curved mirror disposed on the screen side of the variable aperture mechanism and the curved mirror disposed on the opposite side to the screen side of the variable aperture mechanism and a projection reference axis to the curved mirror disposed on the opposite side to the screen side of the variable aperture mechanism.
A projection type of image displaying apparatus, comprising:
- a projection optical unit, the projection optical unit comprising a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system having at least two curved mirrors;
- and
- a variable aperture mechanism, the variable aperture mechanism being mounted and dismounted in a direction substantially perpendicular to a reference plane formed by a projection reference axis between the curved mirror disposed on the screen side of the variable aperture mechanism and the curved mirror disposed on the opposite side to the screen side of the variable aperture mechanism and a projection reference axis from the curved mirror disposed on the screen side of the variable aperture mechanism.
A projection type of image displaying apparatus, comprising:
- a projection optical system for projecting an image light from an image forming element on a screen, the projection optical system including at least two curved mirrors;
- an aperture unit, the aperture unit including a variable aperture mechanism disposed between the two curved mirrors and attachment seats;
- and
- a holding member for surrounding and holding the projection optical system, the holding member including attachment surfaces on which the attachment seats of the aperture unit are attached, the attachment surface being parallel to a reference plane formed by any two reference axes of a projection reference axis between the two curved mirrors, a projection reference axis from the curved mirror disposed at the screen side of the variable aperture mechanism, and a projection reference axis to the curved mirror disposed at the opposite side to the screen side of the variable aperture mechanism;
- wherein the attachment seats of the aperture unit can be mounted and dismounted with respect to the attachment surfaces of the holding member.
Dependencies are inferred from the claim text.