Fuji Photo Optical Co., Ltd.

Fujifilm Corporation

Fujinon Corporation

Pentax Corporation

Asahi Kogaku Kogyo Kabushiki Kaisha

Fuji Photo Film Company, Limited

Hoya Corporation

Nec Display Solutions, Ltd.

Fuji Photo Optical., Ltd.

Fujinon Corpoaation

Chikara Yamamoto

Hitoshi Miyano

Tomonori Masuda

Kazuki Inoue

Hiroshi Tamayama

Masaaki Orimoto

Akiko Nagahara

Takashi Watanabe

Moriyasu Shirayanagi

Tomoyuki Baba

Kazuya Yoneyama

Takayuki Ito

Masaru Amano

Hiroshi Yamada

Yukiko Nagatoshi

Takayuki Sensui

Ryota Ogawa

Masato Kondo

Yoshiaki Ishii

Kenzo Sado

Yasuyuki Miyata

Hiroshi Sato

A projection apparatus includes a display element that displays an image, a projection optical system that forms a projection image by projecting the image, an imaging unit that includes an imaging optical system which images a first region including an optical axis of the projection optical system in the projection image, and an imaging element which captures an image formed by the imaging optical system, and a processor that controls focus adjustment on a second region not including the optical axis in the projection image based on information acquired from the imaging unit, in which a position of the projection image is changeable by changing a relative position between at least a part of the projection optical system and the display element, and a predetermined conditional expression is satisfied.

Projection apparatus

The objective lens for an endoscope includes a stop, at least one lens which is disposed closer to an object side than the stop and of which an image-side lens surface is a concave surface, and at least one set of cemented lenses that is disposed closer to an image side than the stop; focusing on an object positioned at a nearest point from an object positioned at a farthest point is performed by movement of some lenses of an entire system along an optical axis; the objective lens for an endoscope has a total angle of view of 120° or more in a state where focusing on the object positioned at the farthest point is performed and in a state where focusing on the object positioned at the nearest point is performed; and the objective lens for an endoscope satisfies predetermined conditional expressions.

Objective lens for endoscope and endoscope

A projection-type display device includes: a display element including a rectangular displayable region in which an image is displayable; and a projection optical system. Assuming that a focal length of the projection optical system is f and a length of a long side of the displayable region is w, 0.15<|f|/w<0.45 is satisfied. An absorption layer that absorbs light is provided in at least a portion of a non-optically effective surface of a lens which is disposed closer to a reduction side than a first lens closest to an enlargement side in the projection optical system and at least a part of a portion which is irradiated with light that has been emitted from an image and reflected by an enlargement-side surface of the first lens or a reduction-side surface of the first lens.

Projection-type display device

The projection device includes a display element that displays an image, a projection optical system that forms an intermediate image of the image within an air space and projects the intermediate image to form a projected image, and a light shielding member that is disposed within the air space. The light shielding member includes a light shielding region which is positioned outside optical paths of all effective luminous fluxes emitted from the display element and used to form the projected image. The projection device satisfies a predetermined conditional expression.

Projection device and projection system

A projection display device of a front projection type includes a light valve that modulates light based on image data and emits the light and an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface, in which the image forming optical system includes a first optical system that includes at least one lens and a first reflection member that reflects the light emitted from the light valve toward the first optical system, the first optical system and the first reflection member are configured to be rotatable in a pitch direction, and the first reflection member rotates by a pitch angle &#x3b8;/2 in conjunction with rotation of the first optical system by a pitch angle &#x3b8;.

Projection display device

An optical unit includes: a projection optical system on which light from a display unit is incident; a common optical system that projects light passing through the projection optical system to a projection target object and forms an image of a subject at a side of the projection target object; an optical member for guiding light passing through the projection optical system to the common optical system and guiding an intermediate image formed by at least a part of the common optical system to an imaging element; and an imaging optical system for forming the intermediate image on the imaging element, and an image forming position of the intermediate image is present between a component closest to a side of the projection target object among components constituting the common optical system and the optical member.

Optical unit and projection apparatus

An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface, forms the intermediate image on an imaging plane again, and includes an aperture stop that is provided between the intermediate image and the imaging plane. Conditional expression (1) is satisfied in a case in which a distance between a lens surface closest to an object and a paraxial entrance pupil position on an optical axis is denoted by FS and a focal length of the entire system is denoted by f,||&#x3c;0.75&#x2003;&#x2003;(1)

Objective optical system for endoscope and endoscope

The projection display device includes an imaging element, a light valve, and an image-forming optical system that projects an optical image according to light emitted from the light valve onto a magnification side imaging surface and forms an image of light incident from a magnification side on an imaging element. The image-forming optical system includes a first optical system that comprises at least one lens and is used in common in projection and imaging, and a separation member that separates an optical path from the light valve toward the first optical system from an optical path from the first optical system toward the imaging element. An antireflection layer is comprised in at least one of antireflection target surfaces having a significant influence of ghost light.

A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light in a prescribed polarization state, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The first optical system comprises a quarter wave plate and a polarizer arranged in a state of transmitting the light emitted from the light valve.

Projection display device for performing projection and imaging comprising optical image emitting light valve and imaging optical system

A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The third optical system includes a first light shielding member that is arranged in the vicinity of a stop position of the third optical system and shields a part of a luminous flux.

Projection display device for projecting and imaging

An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, an F-Number of the entire system is denoted by FNo, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by R.0.7&#x3c;&#x2003;&#x2003;(1)|6&#x2003;&#x2003;(2)&#x2212;2&#x3c;&#x3b2;&#x3c;&#x2212;0.8&#x2003;&#x2003;(3).

An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, a maximum effective luminous flux diameter among effective luminous flux diameters on lens surfaces of the entire system is denoted by BD, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by &#x3b2;R.0.7&#x3c;&#x2003;&#x2003;(1)&#x3c;0.5&#x2003;&#x2003;(2)&#x2212;2&#x3c;&#x3b2;&#x3c;&#x2212;0.8&#x2003;&#x2003;(3)

The number of lenses within an objective lens for endoscopes is only three. The objective lens for endoscopes includes, in order from the object side, a first lens which is a single lens having a negative refractive power and a concave surface toward the object side, an aperture stop, and a cemented lens. The cemented lens is formed by cementing one positive lens and one negative lens together. Conditional formulae related to the distance from the surface toward the object side of the first lens to the aperture stop and the Abbe's numbers of the positive lens and the negative lens that constitute the cemented lens are satisfied.

Objective lens for endoscopes and endoscope

There is provided a head-up display device that reflects and enlarges an image, which is displayed on an image display element, by a curved mirror, allows an observer to visually recognize the image as a virtual image, can change a virtual image display position, and is small. A head-up display device, which reflects and enlarges a displayed primary display image by a curved mirror and allows an observer to visually recognize the primary display image as a virtual image, includes a virtual-image-position change portion of changing a distance between the observer and the virtual image and a display-size change portion of changing the display size of the primary display image, and is adapted to satisfy the following conditional expression (1).2.5&#x3c;()/()&#x3c;15.0&#x2003;&#x2003;(1)

Heads-up display device

A distance measurement device includes a detection unit, an optical path forming unit, a common reduction unit that reduces influence of variation of an optical axis of an image formation optical system, and reduces variation of an optical axis of the directional light, an auxiliary reduction unit that auxiliarily reduces at least one of influence of variation of the optical axis of the image formation optical system or variation of the optical axis of the directional light, and a control unit that, in a case of operating the common reduction unit and the auxiliary reduction unit at the same time, controls the common reduction unit and the auxiliary reduction unit to reduce variation of an irradiation position of the directional light in a subject image received as light by a light receiving section.

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Saitama, Japan

Chikara Yamamoto