Abstract: A device for setting exposure quantity for use in micro-film cameras projectors and so forth, wherein an object to be photographed or projected is divided into a plurality of sections, and a quantity of light reflected from, or transmitted through, the object is metered for each of the divided sections, thereby setting the exposure quantity in accordance with the section where the reflected or transmitted light quantity as metered is the maximum.

Abstract: This invention presents a film reader equipped with a reflecting type screen, which is arranged in a housing of the reader and has a number of ring strip surfaces having different inclination angles and arranged concentrically. The common center of the ring strip surfaces is deviated from the center of the screen and locates outside of the screen and the end of the screen nearest to the common center is placed near to an observing aperture in the housing. A light source for illuminating a microfilm having recorded images and an optical system for projecting the image of the illuminated film to the screen are provided. Further, the screen is formed by one synthetic resin or preferably at least two kinds of synthetic resins having different refractive indices and mutually non-soluble property. A reflecting substance may be mixed with said resins.

Abstract: This invention presents a film reader equipped with a reflecting type screen, which is arranged in a housing of the reader and has a number of ring strip surfaces having different inclination angles and arranged concentrically. The common center of the ring strip surfaces is deviated from the center of the screen and located outside of the screen, and the end of the screen nearest to the common center is placed near an observing aperture in the housing. A light source for illuminating a microfilm having recorded images and an optical system for projecting the image of the illuminated film to the screen are provided. Further, the screen is formed by one synthetic resin or preferably at least two kinds of synthetic resins having different refractive indices and mutually nonsoluble property. A reflecting substance may be mixed with said resins.

Abstract: A film reader include a lower casing accommodating a light source and an optical illuminator, and an upper casing enclosing a reflection type screen, the upper casing being collapsible and having an opening for observing the reflection type screen. A filter is disposed in the opening. One end of the filter is pivotably mounted to the upper casing and the other end of the filter is detachably mounted.