摘要:
A film trap and gate assembly (24) for use on a motion picture projector (10). The film trap (26) includes an image aperture (60) and a first and second trap rail assembly (64A, 64B). The film trap further includes a stripper plate (72) having an angled stripper blade (94) attached to an attachment flange (92). The stripper blade is attached to the attachment flange at an at least one degree angle, preferably biased towards the trap body (58). The film gate (28) includes a projection aperture (54) and a first and second gate rail assembly (104A, 104B). A film tensioning assembly (110) is attached to the gate body (100), the film tensioning device having a deformable body (112) disposing at least two tensioning rollers (118; 120), and an adjustable tensioning device. When assembled, the film trap and gate assembly (24) forms a film movement channel to guide the film (14) past an illumination source (30), while reducing the contact between the film strip (14) and the film trap and gate assembly (24). Consequently, the number of showing of a motion picture film is substantially increased.
摘要:
A movie film image projecting device wherein a movie film is intermittently stopped in a manner synchronized with rotation of a sprocket by means of travel-synchronizing holes (10) which have been formed longitudinally with respect to the movie film and a light from a light source is projected on a stated region of the movie film at a stopped base position. Detectors (11, 12) for detecting at a plurality of locations the displacement of the film (1) from the base position at the time the movie film has stopped, on the basis of the travel-synchronizing holes (10), output a different position detection signal corresponding to the deviation of the film (1) from the base position at each of the plurality of locations. An abnormality judging circuit (53) supplied with the position detection signals determines whether or not the position detection signals are abnormal and outputs an abnormality detection signal for each of the position detection signals which is determined to be abnormal. An optical axis correcting unit (8, 14) supplied with the position detection signals and the abnormality detection signals then corrects the optical axis of light transmitted through the movie film on the basis of the position detection signals which are judged by the abnormality judging means (53) to be not abnormal.
摘要:
A film transport mechanism for an optical printer in which the film is positively clamped and laterally tensioned at the position of the aperture between each film advance step, so that the film lies absolutely flat in the focal plane of the lens system of the printer during exposure. This is achieved by providing registration pins and a pressure pad at one side of the film and a curved blade at the other side that move towards and clamp the film. The blade progressively tensions the film laterally against the pressure pad and registration pins.
摘要:
Die Erfindung betrifft einen Filmabtaster (10) zur digitalen Archivierung eines auf einem Filmstreifen (11) in Form einer Sequenz von Einzelbildern (13) analog gespeicherten Laufbildfilms mit einer Lichtquelle (12) zur Durchleuchtung eines jeweils abzubildenden Einzelbildbereichs (15) des Filmstreifens, einem opto-elektronischen Bildwandler (14) zur elektronischen Erfassung des jeweils abgebildeten Einzelbildbereichs und einer optischen Abbildungseinheit (16) zur Abbildung des Einzelbildbereichs auf den Bildwandler. Die optische Abbildungseinheit umfasst weiterhin eine reflektierende Projektionsfläche (18) und ein optisches Bauelement (19), welches dazu ausgelegt ist, ein von dem Einzelbildbereich ausgehendes Projektionslichtstrahlenbündel (B1) auf die Projektionsfläche auszurichten und ein von der Projektionsfläche ausgehendes Reflexionslichtstrahlenbündel (B2) auf den Bildwandler auszurichten, wobei das Projektionslichtstrahlenbündel und das Reflexionslichtstrahlenbündel zwischen dem optischen Bauelement und der Projektionsfläche jeweils innerhalb desselben optischen Teilpfads verlaufen. Die Erfindung betrifft weiterhin ein entsprechendes Verfahren. Durch die Projektion auf die reflektierende Projektionsfläche, beispielsweise eine weiße Leinwand, wird ein Zwischenbild erzeugt, bei welchem gegenüber einem direkten Abtasten des Films über eine unmittelbare optische Abbildung des Filmstreifens auf dem Bildwandler der durch den Filmstreifen bereitgestellte Kontrast deutlich reduziert ist.
摘要:
A perforated filmstrip transportation and registration system (100) and method provide a substrate in the form of a rotating drum (104) with vacuum holes (106) to allow an internally produced vacuum to act upon an engaged filmstrip (102). The rotating drum (104) has a number of registration-tension pin pair assemblies (216) that register and subsequently advance a filmstrip (102) at the 3 o'clock position in a registration mode (Figures 2 and 3), and are ready to be inserted in filmstrip perforations (208) when they approach the 3 o'clock position in a load mode (Figure 4). The registration-tension pin pair assemblies (216) each contain a registration pin (220) and a tension pin (230) which are sized small enough to fit into filmstrip perforations (208) without interference, and which move away and towards each other in the nature of scissors blades in the preferred embodiment. In the registration mode, a side of the registration pin (220) rests against a side of one perforation, while the tension pin (230) engaged in an adjacent perforation, places the filmstrip (102) in tension by moving away from the registration pin (220). In the load mode, the tension pin (230) moves toward the registration pin (220) so that distance therebetween allows both pins to be easily inserted into prospective adjacent filmstrip perforations (208). In the preferred embodiment, the registration and tension pins (220, 230) are part of pin bodies (222, 232) which are spring loaded and activated via interaction with cam surfaces (260, 262).
摘要:
A pressure member (49), which can be in either a camera (1) or a cartridge (23), is urged toward photographic film by a simple and compact urging mechanism which includes a flexible strip (55) providing means for urging said pressure member against photographic film and a pin (101) providing means for applying a longitudinal force to the strip (55) to vary the bow in a bowable portion (57') of the strip. The strip (55) is positioned to apply an urging force to the pressure member (49) as a function of the amount of such a bow
摘要:
The invention relates to a camera system and to a display device for displaying images recorded by the camera system. The camera system comprises a camera (1) provided with an optics system (2) and a photosensitive image surface (3) disposed near the optics symmetrically relative to its optic axis, the image refracted by the optics being projected onto said image surface. The photosensitive image surface is a concave spherical surface whose center of curvature is at the focal point of the optics.
摘要:
A compact rolling loop motion picture projector has a rotor of significantly smaller diameter than a conventional such rotor. The radius of curvature of the rotor is selected to be significantly less than the radius of curvature of a film flattener element on which the film is located for projection, and the axis of rotation of the rotor is offset towards a film input sprocket of the projector so as to maintain a minimum film gap between the rotor and the field flattener usptream of the optical axis of the projector. The compact rotor is rotationally supported from above by a "spider" and a projection lamp is located below the rotor for compactness and efficiency of lamp operation.
摘要:
A camera frame assembly is used with a film unit having a filmstrip and a film holder. The filmstrip has a leading portion having a free end and a grip adjoining the free end. The filmstrip has a main portion adjoining the leading portion. The camera frame assembly has a frame which has a film return chamber configured to receive the film holder, a film roll chamber spaced apart from the film return chamber, and a midsection extending between the chambers. The midsection has an exposure opening and a pair of film guide surfaces adjoining the exposure opening. The film guide surfaces define a film path between the chambers. A holdfast is joined in fixed relation to the midsection adjacent the film roll chamber. The holdfast extends outward from the midsection toward the film path. The holdfast is fully outside the film path. The holdfast engages the grip when the filmstrip is in a first position. The holdfast is spaced from the filmstrip when the filmstrip is in a second position, in which the main portion is disposed against the film guide surfaces and extends from one of the chambers to the other.