Fujifilm Corporation

Fujinon Corporation

Nanchang O-film Optical-electronic Tech Co., Ltd.

Masaru Amano

Yukiko Nagatoshi

Hironobu Kayano

Akiko Nagahara

Kenji Ito

Masanao Kawana

Kazuki Inoue

Tomoyuki Baba

Takeshi Kamiya

Chikara Yamamoto

Taro Asami

Taiga Noda

Masao Mori

Kazuyoshi Okada

Masaru Yonezawa

Kimiaki Nakazawa

Tetsuo Kamigaki

A projection lens, which is mounted on a housing of a projection device including an electro-optical element, includes a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes, a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis, a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis, and a second holding part holds the first reflective part and the second reflective part. A distance along the first optical axis between a first lens, which is made of glass and is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part. The first optical system includes an aspherical third lens that is made of a resin material and is disposed between the first lens and the first reflective part.

Projection lens and projection device

The zoom lens consists of a first optical system including a lens at a position closest to the magnification side and a second optical system forming an intermediate image in order from the magnification side. The first optical system reforms the intermediate image on a magnification side imaging plane. The second optical system includes a lens group including an aperture stop, having a negative refractive power, and moving during zooming. The zoom lens satisfies a conditional expression: 0.1<f2w/fAp<2.1, where fAp is a focal length of the lens group having the aperture stop and f2w is a focal length of the second optical system at a wide angle end.

Zoom lens, projection type display device, and imaging apparatus

A projector includes a projection lens and a projector body. In the projection lens, a U-shaped optical path is formed by optical axis to optical axis. A lens barrel is a U-shaped barrel. A housing of the projector body includes a storage section. The projection lens is supported rotatably about the optical axis with respect to the housing, in an up-down direction and a right-left direction of the housing perpendicular to the optical axis, between a first position where the projection lens is stored inside a storage section provided in the housing and a second position where the projection lens is protruding from the housing.

Projector with rotatable projection lens

A projection lens is a projection lens that emits incident light through a plurality of lenses, and includes a first lens that is disposed to be closest to an emission side, a second lens which is adjacent to the first lens and of which a diameter is smaller than a diameter of the first lens, and a frame that includes a first surface and is positioned outside the second lens in a radial direction. The first surface faces the first lens, the first surface has a light reflection-reducing structure, and a value of G1/G2 is 1.7 or more in a case where a diameter of the first lens is denoted by G1 and a diameter of the second lens is denoted by G2.

Projection lens and projection device having a space interposed between a frame and a first lens

A projection lens, which is mounted on a housing of a projection device including an electro-optical element, includes a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes, a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis, a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis, and a second holding part holds the first reflective part and the second reflective part. A distance along the first optical axis between a first lens, which is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part. The first optical system includes a second lens that is disposed to be closest to an enlargement side to form an intermediate image of an optical image of the electro-optical element.

Projection lens with a first optical system to form an intermediate image of an optical image and projection device

One embodiment according to the technique of the present disclosure provides a projection device having a plurality of modes in which relationships between an incidence region and an emission region in an electro-optical panel are different from each other. In the projection device according to one aspect of the present invention, a control unit controls a first mode and a second mode. The first mode is a mode in which a first range of an optical region is the incidence region and a range within the first range is the emission region, and the second mode is a mode in which a second range narrower than the first range of the optical region is the incidence region and a range within the second range is the emission region.

Projection device

A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.

Zoom lens, projection display device, and imaging apparatus for forming an intermediate image

A first holding barrel, a first mirror bending a first optical axis of the first holding barrel at 90&#xb0;, a second holding barrel, a second mirror bending a second optical axis of the second holding barrel at 90&#xb0;, and a third holding barrel are disposed on an optical axis from a screen side to an image forming panel. A first connection member connects the first holding barrel including the first mirror to the second holding barrel to be rotationally movable in increments of 90&#xb0;. A second connection member connects the second holding barrel and the second mirror to the third holding barrel to be rotationally movable in increments of 90&#xb0;. An orientation of a display image of the image forming panel is changed based on rotational movement states of an optical axis of a first sensor and an optical axis of a second sensor to make an orientation of a projection image on the screen match an original image.

Projector

The imaging optical system forms a first intermediate image at a position conjugate to a magnification side imaging surface and a second intermediate image at a position closer to a reduction side than the first intermediate image on an optical path and conjugate to the first intermediate image. The imaging optical system consists of a first optical system, a second optical system, and a third optical system in order from the magnification side to the reduction side along the optical path. The imaging optical system does not include a reflective member having a power.

Imaging optical system, projection type display device, and imaging apparatus

An imaging optical system consists of, in order from a magnification side: a first optical system that forms an intermediate image on a position conjugate to a magnification side imaging surface; and a second optical system that re-forms the intermediate image on a reduction side imaging surface. The first optical system includes at least two focusing lens groups that move with different loci during focusing. The imaging optical system satisfies predetermined conditional expressions relating to the focusing lens groups.

Imaging optical system, projection display device, and imaging apparatus

The imaging optical system consists of, in order from a magnification side: a first imaging optical system that forms an intermediate image on a position conjugate to a magnification side imaging surface; and a second imaging optical system that re-forms the intermediate image on a reduction side imaging surface. The first imaging optical system consists of, in order from the magnification side, a first A lens group, a first optical path deflection unit that deflects an optical path, a first B lens group, and a second optical path deflection unit that deflects the optical path. In addition, the intermediate image is formed between the second optical path deflection unit and the second imaging optical system.

Growing community of inventors

Saitama, Japan

Masaru Amano