Minolta Camera Kabushiki Kaisha

Osami Katoh

Hideaki Kusano

Nobuo Ueda

Takanori Saito

An image projecting system for irradiating a microfilm with light emitted from a light source and projecting an image recorded on the microfilm onto an image receptor such as a screen or a photosensitive drum, the image projecting system having a masking unit which is mounted in the body of the system removably. The masking unit contains a first masking portion which is for changing the range of the image advancing toward the image receptor through an optical path, in a first direction of the microfilm, and a second masking portion which is for changing the range of the image in a direction approximately perpendicular to the said first direction. These masking portions are disposed in close proximity to the microfilm. Thus, a desired range of the image recorded on the microfilm can be projected on the image receptor and the outer peripheral edge of the projected image is made sharp and clear by the above masking portions. Normal operation and other operations for maintenance can be done easily by removing the masking unit from the system body.

Image projecting system

An image projecting system for irradiating a microfilm with light emitted from a light source and projecting an image recorded on the microfilm onto an image receptor such as a screen or a photosensitive drum, the image projecting system having a masking unit which is removably mounted in the body of the system. The masking unit contains a first masking portion which is for changing the range of the image advancing toward the image receptor through an optical path, in a first direction of the microfilm, and a second masking portion which is for changing the range of the image in a direction approximately perpendicular to the first direction. These masking portions are disposed in close proximity to the microfilm. Thus, a desired range of the image recorded on the microfilm can be projected on the image receptor and the outer peripheral edge of the projected image is made sharp and clear by the above masking portions. Normal operation and other operations for maintenance can be done easily by removing the masking unit from the system body.

A micro film reader for projecting by optical devices on a projection surface a selected image recorded in a micro film having a plurality of recording channels in a direction of width of the micro film. The micro film reader has a film carrier for holding and transporting the micro film, a drive motor for shifting the film carrier in the width direction of the micro film, shifting amount setting keys for setting shifting amount of the film carrier, and a channel switching device. The channel switching device controls the drive motor to shift the film carrier by a shifting amount set by means of the shifting amount setting keys. The micro film reader further has a film shifting device for controlling the drive motor to shift the film carrier by a certain amount in response to external signals.

Growing community of inventors

Sagamihara, Japan

Osami Katoh