Projection lens and projector
AssigneeFUJIFILM Corporation
InventorYasuto KURODA
Life of this patent
Estimating the term…
Abstract
A first holding member holds a first optical system and a first mirror, and has a first junction surface. A second holding member holds a second optical system and a second mirror, and has a second junction surface. A junction portion is configured such that, in a state where the first junction surface and the second junction surface are aligned with each other, the second holding member is capable of being shifted in a direction of both the junction surfaces and rotated around an optical axis, and makes it possible to perform optical axis alignment. An emission-side optical axis of the first optical system and an incidence-side optical axis of the second optical system are aligned with each other, and thus a U-shaped optical path is formed by the first and second optical systems.
Claims20
A projector comprising:
- a projector body;
- and
- a projection lens attached to the projector body, the projection lens comprising:
- at least one incident lens;
- a first optical axis bending member disposed between the incident lens and an intermediate lens, in an optical path;
- at least one emission lens that projects light from the incident lens;
- and
- a second optical axis bending member disposed between the first optical axis bending member and the emission lens, in an optical path;
- wherein the first optical axis bending member bends an optical axis of the projection lens from a first direction to a second direction intersecting the first direction,
- wherein the second optical axis bending member bends the optical axis from the second direction to a third direction opposite to the first direction,
- wherein the emission lens projects a projected image having an edge in a vertical direction which is closest to the projector body in a side view,
- wherein the projection lens is possible to shift to the projector body at least in a vertical direction, so that the projector can change a projection position of the projected image in a state where a position of the projector is fixed;
- and
- wherein the projector can cause the edge of the projected image to be substantially coincident with an optical axis of the emission lens by shifting the projection lens.
A projector comprising:
- a projector body;
- and
- a projection lens attached to the projector body, the projection lens comprising:
- at least one incident lens;
- a first optical axis bending member disposed between the incident lens and an intermediate lens, in an optical path;
- at least one emission lens that projects light from the incident lens;
- and
- a second optical axis bending member disposed between the first optical axis bending member and the emission lens, in an optical path;
- wherein the first optical axis bending member and the second optical axis bending member form a substantially U-shaped optical path,
- wherein the projection lens is possible to shift to the projector body at least in a vertical direction, so that the projector can change a projection position of the projected image in a state where a position of the projector is fixed;
- and
- wherein the projector can cause the edge of the projected image is substantially coincident with an optical axis of the emission lens by shifting the projection lens.
Dependencies are inferred from the claim text.