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1. 发明授权

US3754823A Light source for color enlargers 失效
标题翻译：彩色光源的光源
公开(公告)号：US3754823A
公开(公告)日：1973-08-28
申请号：US3754823D
申请日：1971-12-14
申请人： BERKEY PHOTO INC
发明人： SIMMON A , WEISGLASS L , FLIEDER R
IPC分类号： G03B27/73 , G03B27/76
CPC分类号： G03B27/73
摘要： In the photographic enlarging apparatus disclosed, three filters partially intercept a white light beam emerging from a light source having a reflector. The filters divide the beam into a white portion and an intensely colored portion. A mixing chamber mixes the white and intensely colored light. A diffuser at the bottom of the chamber illuminates a color film, either negative or positive slide. Optical means focus the light at the film onto printing paper. A light attenuator composed of a perforated metal plate is interposed between the source and the filters to dim the total light output of the enlarger. Mechanical means allow the attenuator to be shifted into and out of the beam. The face of the attenuator directed away from the source and toward the filters is provided with a reflecting surface. This reflecting surface prevents an undesirable color shift when the attenuator is moved into or out of the beam.
摘要翻译：在所公开的照相放大装置中，三个滤光器部分截取从具有反射器的光源出射的白光束。滤光器将光束分成白色部分和强烈着色部分。混合室混合白色和强烈着色的光。室底部的扩散器照亮彩色胶片，无论是负片还是正片。光学手段将光线聚焦在胶片上。由穿孔金属板构成的光衰减器插入在源极和滤光器之间，以使放大器的总光输出变暗。机械装置允许衰减器移入和移出光束。衰减器的指向远离光源并朝向滤光片的表面设置有反射表面。当衰减器移入或移出光束时，该反射表面防止不期望的色移。

2. 发明授权

US3756712A Illumination system for color enlargers and the like 失效
标题翻译：彩色放大器的照明系统和类似的
公开(公告)号：US3756712A
公开(公告)日：1973-09-04
申请号：US3756712D
申请日：1971-12-14
申请人： BERKEY PHOTO INC
发明人： WEISGLASS L , FLIEDER R
IPC分类号： G03B27/32 , G03B27/73 , G03B27/72
CPC分类号： G03B27/73
摘要： In the apparatus disclosed, three dichroic filters partially intercept a white light beam emerging from a light source having an elliptical reflector with a focal point at the location of the filters. The filters thus divide the beam into a white portion and an intensely colored portion. The beam enters a mixing chamber through a porthole and strikes a slanted white-opaque ceiling to form a hyperbolic section. White-opaque sidewalls coact with the ceiling to mix the white and intensely colored light. The light exists through a diffuser at the bottom of the chamber so that it can be used to illuminate a color negative in a color enlarger which focuses the light on printing paper. A cylindrical mirror at the entrance porthole reflects a part of the marginal portion of the colored part of the beam toward the white side while reflecting part of the white light into the intensely colored light. This allows the mixing chamber to blend the light and avoid a color wedging effect on the print. The diffuser at the exit of the chamber tapers from a thick center outwardly toward thinner edges. Thus, the diffuser scatters more of the light at its center and transmits more at its edges. This compensates for falloff of intensity from center to outside. The scattering of light within the diffuser causes unused light to reenter the chamber for further mixing. A matte finish on the bottom of the diffuser prevents the light which is reflected by a carrier holding the film from being rereflected onto the edges of the film.
摘要翻译：在所公开的装置中，三个二向色滤光器部分截取从具有椭圆形反射器的光源出射的白光束，其中焦点位于滤光器的位置处。因此，滤光器将光束分成白色部分和强烈着色部分。梁通过舷窗进入混合室，并撞击倾斜的白色不透明天花板，形成双曲线段。白色不透明的侧壁与天花板共同混合白色和强烈色彩的光。光通过腔室底部的扩散器存在，从而可以将色彩放大器中的彩色负片照亮，从而将光聚焦在打印纸上。入口孔口处的圆柱形镜将反射部分的白光反射到白色侧的彩色部分的边缘部分的一部分，并将其反射到强烈着色的光中。这样就可以使混合室混合光线，并避免在打印件上产生颜色楔入效果。在室的出口处的扩散器从厚的中心向外朝向较薄的边缘逐渐变细。因此，扩散器将更多的光散射在其中心并在其边缘处更多地传播。这补偿了从中心到外面的强度衰减。扩散器内的光的散射使未使用的光重新进入腔室进一步混合。在扩散器底部的无光饰面防止由保持膜的载体反射的光被再反射到膜的边缘上。

3. 发明授权

US3754824A Light color control apparatus 失效
标题翻译：浅色控制装置
公开(公告)号：US3754824A
公开(公告)日：1973-08-28
申请号：US3754824D
申请日：1971-12-14
申请人： BERKEY PHOTO INC
发明人： WEISGLASS L , FLIEDER R , RUBIN L
IPC分类号： G03B27/73 , G03B27/76
CPC分类号： G03B27/73
摘要： The disclosed apparatus forms part of the lamp house in a photographic enlarger. Three dichroic filters partially intercept a white light beam emerging from a light source having an elliptical reflector. The filters divide the beam into a white portion and an intensely colored portion. The beam enters a mixing chamber wherein white-opaque side walls and a ceiling coact with each other to mix the white and intensely colored light. The light exits through a diffuser at the bottom of the chamber and passes through a color slide or negative having a color image. An optical system focuses the image on printing paper. Three pivotally mounted filter holders support the filters in their respective positions. Three cams movable by manually adjustable wheels control the positions of the holders. A control arm engageable with all three of the holders simultaneously draws the filter holders out of engagement with the cams until the filters are removed from the beam. A regulating arm moves an attenuator into the path of the beam.
摘要翻译：所公开的装置在照相放大器中形成灯室的一部分。三个二向色滤光器部分截取从具有椭圆形反射器的光源出射的白色光束。滤光器将光束分成白色部分和强烈着色部分。光束进入混合室，其中白色不透明的侧壁和天花板相互配合以混合白色和强烈着色的光。光通过腔室底部的扩散器射出，穿过彩色载玻片或带有彩色图像的阴极。光学系统将图像聚焦在打印纸上。三个可枢转安装的过滤器支架在其各自的位置支撑过滤器。可通过手动调节轮移动的三个凸轮控制支架的位置。可与所有三个支架接合的控制臂同时将过滤器支架脱离与凸轮的接合，直到过滤器从梁上移除。调节臂将衰减器移动到梁的路径中。

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