Abstract: A lens-fitted photographic film package comprises a light-tight film case having exposure structure, a rolled film in a film roll receiving chamber disposed on one side of an exposure frame in the light-tight case, and a removable film container having a film winding spool therein disposed on the other side of the exposure frame in the light-tight film case. A member is provided for causing the film to be advanced smoothly without getting scratched, for preventing the film roll from becoming loose, and for preventing the film from being gouged by a film exit slot of the film roll receiving chamber.

Abstract: A lens-fitted photographic film package having exposure structure includes a light-tight securely closed film casing provided with a taking lens, a film container containing an unexposed film, a removable light-tight film container having a spool to which a leading end of the film is attached, and a film-advancing member externally operable for rotating the film spool to wind the film around the spool in the light-tight film container one frame every exposure.

Abstract: A distance detection apparatus comprising: a distance detection unit for detecting information on a distance to an object, a controller for operating the detection means a plurality of times, and for processing a plurality of information on the distance and outputting an optimum distance information; a status detector for detecting a status of the object for outputting information on the status; and a circuit for altering an information processing method of the controller, in accordance with the output of the status detection means.

Abstract: A photographic film package has a taking lens, an exposure member, and a rolled film, with their associated elements, contained in a light-tight film container as a unit. The taking lens consists of either an aspherical or a spherical single-element lens preferably made of plastic material and is designed to have a focal length f and a lens speed F defined by the following conditions:F.gtoreq.f.sup.2 /150F.gtoreq.34.3-0.75fF.ltoreq.

Abstract: A lens-fitted photographic film package having a light-tight film case in which a taking lens, an exposure member and a roll film, with their associated elements, all of which are previously encased therein, is provided with a direct-vision viewfinder comprising a finder frame opening formed in a rearwardly recessed part of a front wall of the light-tight film case and a viewing opening formed in a rear wall of the light-tight film case.

Abstract: A reflection-type overhead projector having a projection lamp and projection lens-and-mirror system disposed above a base on a gooseneck arm for projecting a transparency placed on the base on a remote screen. The overhead projector has a copying device incorporated therein for making a copy from a reflective original on a secondary original or a transparency, which comprises an image-scanning head movable lengthwise over the reflective original placed on a Fresnel mirror on the base to provide image signals; a mirror attached to the image scanning head for directing light from the projection lamp onto the reflective original just below the image scanning head; and a thermal printing head for thermally printing an image of the reflective original on a secondary original or a transparency according to the image signals.

Abstract: A photographic film package having at least a taking lens and a member for effecting an exposure, comprises a box-shaped internal film casing with its back open which removably contains a film cartridge therein; an exposure chamber in the internal film casing; a supporting member supporting and forcing the film cartridge against the exposure chamber so as to maintain the inside of the exposure chamber light-tight; and a box-shaped external film casing encasing the internal film casing therein and which is provided with openings for exposing the taking lens and the exposure effecting member.

Abstract: A light metering device for single lens reflex camera having photoelectric transducer elements arranged in the optical path of a finder thereof. The photoelectric transducer elements are arranged ahead of a focusing screen as viewed from the direction of finder light, and an area corresponding to a clear portion of the focusing screen is made either to have a photoelectric transducer structure of narrower width than in the environmental area, or to be light-metered by another or separate light metering optical system.

Abstract: A correlation detecting method in which in order to detect the correlation between a pair of electrical signal trains which should effect a correlation operation, the operation is effected while the relative position of the signal trains is shifted and during the operation, the signal levels of at least the opposite ends of each signal train are reduced relative to the signals at a central position of the signal train, thereby mitigating the correlation error attributable to the signals near the ends of the signal trains.

Abstract: The present invention is characterized by repeatedly AD converting in a time series an output of each light sensitive element, and at the same time an added value or a mean value of each one of said AD converted values is obtained so that such added value or a mean value is used as an output of each light sensitive element. According to the present invention, an influence of flickering of an artificial light source can be eliminated and at the same time a light measuring computation with a high level of accuracy can be made with a higher speed than that in a conventional method, and particularly in a light measuring apparatus housing a number of light sensitive elements a light measuring computation with a high level of accuracy can be made in a by far faster speed than that in a conventional method.

Abstract: A method and apparatus for detecting the focus state of an object image pattern in accordance with a plurality of photo-electrically converted output signals, including a first mode in which the plurality of photo-electrically converted output signals are sampled at different times and statistically processed for each output, wherein the focus state is detected in accordance with the statistically processed outputs, and a second mode for detecting the focus state without the statistical processing.

Abstract: A photographic apparatus in which light entering through an objective is used in photo-electrically detecting the state of focus of a range finder area in the view field, whereby a mask for defining that area is arranged in the effective light beam at or near a predetermined focal plane of the objective and is made to serve as a light meter of thin film form constituting part of an exposure control system.

Abstract: Expandable thermoplastic resin particles comprising a thermoplastic resin and a hydrocarbon having the lower boiling point than the softening point of the thermoplastic resin in which a copolymer composed of a fluorinated vinyl polymer part and a hydrophilic vinyl polymer part covers or is included on the surface or in the surface layer of the expandable thermoplastic particle, said resin particles are useful for producing package vessels and containers for oily or fatty foods.

Abstract: The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily synthesized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

Abstract: A system for detecting the focus of an imaging lens relative to an object includes re-imaging means disposed on the imaging side of the imaging lens and having pupil dividing means for dividing the pupil of the imaging lens into a plurality of areas, the re-imaging means forming a secondary object image of the object from a light beam passed through the plurality of divided areas, an optical system disposed near the predetermined imaging plane of the imaging lens and having a reflecting surface for directing a primary object image of the object to the re-imaging means, and light-receiving means on which the secondary object image by the re-imaging means is formed.

Abstract: A photometric device disposed in the optical path of a view finder of a camera includes a photometric element which includes a plurality of minute photo-electric conversion elements. Each of the minute photometric elements is formed by a minute transparent electrode, a minute photo-electric converter, a minute opaque electrode and a transparent substrate which are arranged in that order from the side of a photo-taking lens.

Abstract: A blur detecting device for a camera comprises a CCD line sensor which is arranged in a position optically equivalent to the surface of the film to produce image signals at different points of time set in response to pushing a shutter button; and a signal processing circuit which computes the degree of a blur which occurred in the image between the different points of time by obtaining the degree of correlation between the image signals.

Abstract: A specialized polymeric peroxide is copolymerized with vinyl type monomers in the presence of organic liquid, thereby obtaining a solution of a copolymer having peroxy bonds therein.This solution is admixed with vinyl type monomers which are different in composition from the ones used in the first copolymerization, and the resultant mixture is subjected to block copolymerization.The obtained block copolymer solution is admixed with an organic liquid which exert solubility to one of polymers of the vinyl type monomers which are employed in the first or second copolymerization, whereby a non aqueous system liquid dispersion is obtained.This dispersion contains a block copolymer in a high concentration and it also is splendid in uniformity of dispersion and dispersion stability.

Abstract: A telephoto lens having a long focal distance is disposed at an upper location at the side portion of a camera body, and the light passed therethrough is reflected sidewardly of the camera body by a pivotable first mirror. Disposed at an upper location of an exposure station is a second mirror which redirects the light from the first mirror to a third mirror disposed in front of and to the side of the second mirror. Below the third mirror and in a front part of an exposure station, a pivotable fourth mirror is disposed. Mounted at an upper location of the side portion of the camera body is an L-shaped movable lens barrel, in which an ultra telephoto lens having an exceptionally long focal length, and a fifth mirror for reflecting the light passed through the ultra telephoto lens toward the second mirror are disposed. The movable lens barrel is associated with the first mirror.

Abstract: The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily syntheized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.