Minolta Camera Kabushiki Kaisha

Nisca Corporation

Nippon Seimitsu Kogyo Kabushiki Kaisha

Masayuki Mino

Mitsutoshi Yagoto

Yutaka Watanabe

Akiyoshi Hamada

Yutaka Tanaka

Osamu Yamada

Shuji Mochizuki

Kyoji Tachikawa

Haruhiro Hyodo

Tetsuo Kyogoku

Masamitsu Ishiyama

An automatic focusing apparatus having an objective lens for forming a beam from a semiconductor laser as a spot image on an image subjecting face, a driving unit for driving the objective lens in a direction parallel to an optical axis thereof, a beam splitter disposed between the semiconductor laser and the objective lens, a pair of grids for generating a moire image displaced in a travelling path of a beam returning from the image subjecting face and reflected by an inclined prism face of the beam splitter, a photo detector for detecting the moire image generated by the grids and an control unit for evaluating a focusing error based on a variation in the moire image pattern and for controlling the driving unit so as to correct the focusing error. The first grid and the second grid are interspaced in parallel to each other along a beam axis and angularly displaced from each other about the beam axis.

Automatic focusing apparatus with moire fringes

An object position measuring system for use in measuring, without contact with an object displacement amounts of an object, conditions of an object surface and the like; the system having a light beam source, a diffraction grating for diffracting light beam emitted from the light beam source, a converging optical arrangement for orienting and converging a pair of positive and negative diffracted beam components of the beam diffracted by the diffraction grating onto the object and for orienting and converging the diffracted beam reflected by the object onto the diffraction grating, and a screen for displaying interference fringes of the reflected diffracted beam components diffracted by the diffraction grating. According to this system, the position of the object is determined by diffracting through the diffracting grating beam emitted from the source, projecting the pair of diffracted beam components onto the object, causing the pair of diffracted beam components reflected by the object to interfere with each other and then by evaluating the resultant interference fringes.

Interferometer object position measuring system and device

There is disclosed an electrophotographic printer for projecting light from light source emitted according to image data onto a photoconductive body performing a mechanical scan operation in a subscan direction so as to form an image of the image data thereon, and for printing the image on a piece of printing paper using the electrophotographic process. In the electrophotographic printer, the light source comprises plural light emitting devices such as LEDs aligned in a main scan direction perpendicular to the subscan direction, and each light emitting device has a light output opening elongated in the subscan direction. Image data received from an external unit are once stored in an image memory, and the image data read therefrom are Fourier transformed. Thereafter, the Fourier transformed data are multiplied by a predetermined frequency characteristic defined by the shape of each light output opening, and data of the obtained product are Fourier inverse transformed as the image data to be printed, thereby improving a deterioration of the quality of said printed image caused when said light output opening is used.

Electrophotographic printer comprising aligned plural light emitting

An image signal processing method and apparatus includes elongated picture elements in a CCD linear image sensor to provide improved resolution. The outputs of the picture elements are converted into digital signals and are processed to compensate for the variance in photosensitivity of each of the individual picture elements.

Image signal processing method and apparatus with elongated picture

A laser recorder applicable to computer output microfilm recording apparatus comprises: a housing, a film feed unit having a film cassette loaded with a rolled heat development film; a film take-up unit for taking up the heat development film on a reel or on a tray, including a film storing mechanism for storing cut films sequentially; a main driving unit for driving the heat development film for advancing at a fixed speed for auxiliary scanning for recording image information on the heat development film, including a slackened film relief mechanism for eliminating slackened film around the main driving unit and a stepping motor driving current control circuit for driving the main driving unit at a low and fixed speed; loop detectors for preventing film feed force and film delivery force from working on the main driving unit, an image information recording unit for main scanning, having a laser optical system for scanning the heat development film across the width thereof to record image information recorded on the heat development film thereon; and a heat-development unit for heat-developing the image information recorded on the heat development film, including a delivery driving roller unit and a guide roller unit driven at different speeds respectively for eliminating blackened film around the heat-development unit as well as controlling the heat-development time, a temperature controller for controlling heat-development unit temperature, and a swing roller for separating the film from the heat-development unit when heat-development is not required.

Film handling for a laser recorder

A document support member for use in a copier and the like upon which an original document is placed. A transparent substrate has a transparent surface-layer formed on the surface thereof which is provided with numerous minute spaces thereon. The said minute spaces are filled with a lubricant so as to reduce friction drag between the original document and the document support member.

Document support table with lubricant and method for forming the same

A laser recorder applicable to computer output microfilm recording apparatus, which comprises; a housing, a film feeding unit having a film cassette containing a rolled heat development film and disposed in the lower section of the housing, a film take-up unit taking up the heat developement film on a reel or on a tray in sheet films, a main driving unit and driving the heat development film for running at a fixed speed for auxiliary scanning for recording image information on the heat development film, an image information recording unit for main scanning, having a laser optical system for scanning the heat development film across the width thereof to record image information thereon, and a heat developement unit for heat-developing the image information recorded on the heat development film.

Laser recorder with stable film feed auxiliary scanning

A laser recorder applicable to computer output microfilm recording apparatus comprises: a housing, a film feed unit having a film cassette loaded with a rolled heat development film; a film take-up unit for taking up the heat development film on a reel or on a tray, including a film storing mechanism for storing cut films sequentially; a main driving unit for driving the heat development film for advancing at a fixed speed for auxiliary scanning for recording image information on the heat development film, including a slackened film relief mechanism for eliminating slackened film around the main driving unit and a stepping motor driving current control circuit for driving the main driving unit at a low and fixed speed; loop detectors for preventing film feed force and film delivery force from working on the main driving unit, an image information recording unit for main scanning, having a laser optical system for scanning the heat development film across the width thereof to record image information recorded on the heat development film thereon; and a heat-development unit for heat-developing the image information recorded on the heat development film, including a delivery driving roller unit and a guide roller unit driven at different speeds respectively for eliminating slackened film around the heat-development unit as well as controlling the heat-development time, a temperature controller for controlling heat-development unit temperature, and a swing roller for separating the film from the heat-development unit when heat-development is not required.

Film handling means for a laser recorder

The disclosure is directed to an image formation apparatus for producing both mirror images and normal images. The apparatus comprises an image inverting prism positionable selectively in an optical path of an image transmission device or outside thereof. The prism is so shaped as to give the same optical path length when positioned in the optical path and when positioned otherwise.

Growing community of inventors

Osaka, Japan

Masayuki Mino