Photographic motion picture apparatus

Claim 2

An accessory for selective mounting upon and use with a motion picture camera having a given maximum viewing angle and object distance and intended for selective use with artificial illumination, for substantially continuously illumiNating a scene during exposure operation to record images of such scene on photosensitive material carried within such camera, said accessory comprising: a support member including first means for receiving a source of illumination of the type which emits both visible and infrared radiation and includes dischroic reflector means partially enclosing such source and configured for directing at least a major portion of such visible radiation in a given direction forwardly of such source along a first path and a major portion of such infrared radiation generally rearwardly of such source; second means mounted on said support member for redirecting such illumination directed along said first path along a second path substantially normal thereto; third means mounted on said support member for uniformly directing such illumination passing along said second path over a solid angle approximately the same as such viewing angle and for providing a substantially uniform apparent source of large area and low apparent brightness as compared to such source; and fourth means for releasably mounting said support member on such camera such that the axis of said solid angle intercepts the axis of such viewing angle at such object distance and said first path is generally normal to the axis of such viewing angle such that the visible radiation from such source is first directed generally laterally outwardly from such camera along said first path and such infrared radiation is directed generally towards such camera and away from such scene and the operator of such camera.

Claim 3

The apparatus of claim 1 wherein such dichroic means is a curved dichroic reflector configured for partially surrounding such source and for directing such visible radiation forwardly of such reflector and for permitting such infrared radiation to pass rearwardly of such reflector, said receiving means is configured for mounting such source and such reflector such that said visible radiation is directed along said first path outwardly of and approximately normal to said support member while said infrared radiation is directed rearwardly towards said support member, said second means includes a reflector element configured for redirecting the visible radiation of said first path along said second path in substantially parallel relation to said support member, and said fourth means includes means for mounting said support member on a side surface of such camera such that said second path is configured to intercept the axis of such viewing angle at such object distance.

Claim 4

An accessory for selective mounting upon and use with a motion picture camera having a given maximum viewing angle and object distance and intended for selective use with artificial illumination for substantially continuously illuminating a scene during exposure operations to record images of such scene on photosensitive material carried within such camera, said accessory comprising: first means for receiving a source of high intensity illumination and a reflector having an open end of given area, such reflector partially surrounding such source and configured for directing illumination thereof through such open end and in a subsequently diverging pattern such that the area of such open end defines a predetermined effective area of such source; second means for substantially uniformly directing illumination from such source over a solid angle substantially the same as such maximum viewing angle and for providing a substantially uniform apparent source of comparatively large area and of low brightness relative to such source when viewed by an observer located in such scene, said second means including a collimating lens and a lenticular screen both of which are of large area as compared to such given area of such open end of such reflector, said collimating lens being coaxially aligned with said lenticular screen and arranged between said first means and said lenticular screen so as to intercept substantially all of the illuminatioN in said diverging pattern and to direct such illumination in a collimated arrangement to said screen and in conjunction with said lenticular screen to uniformly direct such illumination over said solid angle and present to an observer in such scene a large array of substantially equally bright images of the effective area of such source and low intensity as compared to such source so as to thereby collectively provide a relatively large area apparent source of relatively low brightness; and third means for mounting said first and said second means on such camera so as to orient said solid angle for approximate interception of its axis with the axis of such maximum viewing angle at such object distance.

Claim 5

An accessory for selective mounting upon and use with a motion picture camera having a given maximum viewing angle and object distance and intended for selective use with artificial illumination for substantially continuously illuminating a scene during exposure operations to record images of such scene on photosensitive material carried within such camera, said accessory comprising: first means for receiving a source of high intensity illumination and a reflector having an open end of given area, such reflector partially surrounding such source and configured for directing illumination thereof through such open end and in a subsequently diverging pattern such that the area of such open end defines a predetermined effective area of such source; second means for substantially uniformly directing illumination from such source over a solid angle substantially the same as such maximum viewing angle and for providing a substantially uniform apparent source of comparatively large area and of low brightness relative to such source when viewed by an observer located in such scene, said second means including a collimating lens and a lenticular screen both of which are of large area as compared to such given area of such open end of such reflector, said collimating lens being coaxially aligned with said lenticular screen and arranged between said first means and said lenticular screen so as to intercept substantially all of the illuminatioN in said diverging pattern and to direct such illumination in a collimated arrangement to said screen and in conjunction with said lenticular screen to uniformly direct such illumination over said solid angle and present to an observer in such scene a large array of substantially equally bright images of the effective area of such source and low intensity as compared to such source so as to thereby collectively provide a relatively large area apparent source of relatively low brightness; and third means for mounting said first and said second means on such camera so as to orient said solid angle for approximate interception of its axis with the axis of such maximum viewing angle at such object distance.

Claim 6

The accessory of claim 3 wherein such reflector is configured for cooperating with such source to focus the illumination thereof to a given crossover point forwardly of said source and thereafter in said diverging pattern, and said collimating lens is a positive lens having a given focal length, said positive lens being spaced forwardly of such crossover point a distance approximately equal to its said focal distance and relatively closely spaced to said lenticular screen.

Claim 7

The accessory of claim 3 wherein said first means is arranged in relation to said second means such that illumination from such source is directed by such reflector along a first path at an angle to the axis of said collimating lens, and said accessory additionally includes a second reflector element configured to redirect the illumination passing along said first path along a second path coaxial with the axes of said collimating lens and said lenticular screen.

Claim 8

The apparatus of claim 3 wherein the area of both said collimating lens and said lenticular screen is at least 10 times such given area of the open end of such reflector.

Claim 9

The apparatus of claim 3 wherein said area of said lens and said screen is at least 60 times such given area of the open end of such reflector.

Claim 10

The accessory of claim 7 wherein said collimating means is a Fresnel lens and said lenticular screen includes more than 50 lenticules per inch.

Claim 11

A motion picture camera system for substantially continuously illuminating a scene during exposure operations for recording images of such scene on photosensitive material, said system comprising: a substantially light tight housing; means disposed within said housing for supporting such photosensitive material at an exposure plane; means on said housing for mounting an objective lens for forming an image at said exposure plane of a field of view of predetermined maximum angular extent; first means for mounting a source of high intensity illumination and a reflector having an open end of given area, such reflector partially surrounding such source and configured for directing illumination thereof through such open end and in a subsequently diverging pattern such that the area of such open end defines a predetermined effective area of such source; and second means on said housing for substantially uniformly directing illumination from said source over a solid angle conforming to such maximum extent of such field of view and for providing a substantially uniform apparent source of low brightness when viewed by an observer located in such scene, said second means including a collimating lens and a lenticular screen both of large area as compared to said given area of such open end of such reflector, said collimating lens being coaxially aligned with said lenticular screen and arranged between said means for mounting said source and said lenticular screen so as to intercept substantially all of the illumination in said diverging pattern and to direct it in a collimated arrangement to said lenticular screen and in conjunction with said lenticular screen to uniformly direct such illumination over said solid angle and present to an observer in such scene a large array of substantially equally bright images of the effective areA of such source and low intensity as compared to such source so as to thereby collectively provide a large area apparent source of relatively low brightness.

Claim 12

A motion picture camera system for substantially continuously illuminating a scene during exposure operations for recording images of such scene on photosensitive material, said system comprising: a substantially light tight housing; means disposed within said housing for supporting such photosensitive material at an exposure plane; means on said housing for mounting an objective lens for forming an image at said exposure plane of a field of view of predetermined maximum angular extent; first means for mounting a source of high intensity illumination and a reflector having an open end of given area, such reflector partially surrounding such source and configured for directing illumination thereof through such open end and in a subsequently diverging pattern such that the area of such open end defines a predetermined effective area of such source; and second means on said housing for substantially uniformly directing illumination from said source over a solid angle conforming to such maximum extent of such field of view and for providing a substantially uniform apparent source of low brightness when viewed by an observer located in such scene, said second means including a collimating lens and a lenticular screen both of large area as compared to said given area of such open end of such reflector, said collimating lens being coaxially aligned with said lenticular screen and arranged between said means for mounting said source and said lenticular screen so as to intercept substantially all of the illumination in said diverging pattern and to direct it in a collimated arrangement to said lenticular screen and in conjunction with said lenticular screen to uniformly direct such illumination over said solid angle and present to an observer in such scene a large array of substantially equally bright images of the effective areA of such source and low intensity as compared to such source so as to thereby collectively provide a large area apparent source of relatively low brightness.

Claim 13

The system of claim 9 wherein said means for mounting said source is arranged in relation to said collimating lens and said lenticular screen such that such illumination of such source is directed by such reflector along a first path at an angle to the axis of said collimating lens and said system additionally includes a second reflector element mounted on said housing for redirecting the illumination passing along said first path along a second path coaxial with the axes of said collimating lens and said lenticular screen.

Claim 14

The system of claim 9 wherein the area of both said collimating lens and said lenticular screen is at least 10 times such given area of the open end of such reflector.

Claim 15

The system of claim 9 wherein the area of both said collimating lens and said lenticular screen is at least 60 times such given area of the open end of such reflector.