Photographic color effects lighting filter system

• US 6,259,572 B1
• Filed: 02/21/1996
• Issued: 07/10/2001
• Est. Priority Date: 02/21/1996
• Status: Expired due to Term

• Current Assignee: Rosco Laboratories, Inc.
• Original Assignee: Rosco Laboratories, Inc.
• Inventors: Meyer, James E. Jr.
• Primary Examiner(s): Spyrou, Cassandra
• Assistant Examiner(s): CHANG, AUDREY Y
• Application Number:
  US08/604,340
• Time in Patent Office: 1,966 Days
• Field of Search: 359/885-891, 396/275, 396/276, 396/4, 362/293, 362/3, 362/16, 362/17, 362/18
• US Class Current: 359/885
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence

Abstract

A photographic color effects lighting filter system made up of a series of lighting filters which are designed to be placed in front of one or more lighting sources. The lighting color effects filter series is made up of groups of filters wherein each of the filter groups is composed of a plurality of filters wherein each filter within a given group provides selective absorption of light having a color corresponding to one of the primary, secondary or intermediary colors. Each of the filters within a given group has a specific effective absorption density. The effective absorption densities are calibrated so that the selected absorption densities are the same for each of the different color groups.

Claims

1. A photographic lighting system comprising:

a) a first light source; and

b) a filtered light source comprising;

a second light source; and

a lighting filter located in front of said second light source, said lighting filter being selected from a filter system comprising;

a blue filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density blue filter, a 0.30 density blue filter, a 0.60 density blue filter and a 0.90 density blue filter;

a green filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density green filter, a 0.30 density green filter, a 0.60 density green filter and a 0.90 density green filter;

a red filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density red filter, a 0.30 density red filter, a 0.60 density red filter and a 0.90 density red filter; and

a scene which is illuminated by said first light source and said filtered light source.

2. A photographic lighting system according to claim 1 wherein said filter system further comprises:

a yellow filter group comprising a 0.15 density yellow filter, a 0.30 density yellow filter, a 0.60 density yellow filter and a 0.90 density yellow filter;

a magenta filter group comprising a 0.15 density magenta filter, a 0.30 density magenta filter, a 0.60 density magenta filter and a 0.90 density magenta filter; and

a cyan filter group comprising a 0.15 density cyan filter, a 0.30 density cyan filter, a 0.60 density cyan filter and a 0.90 density cyan filter.

3. A photographic lighting system according to claim 2 wherein said filter system further comprises:

a cyan-blue filter group comprising a 0.15 density cyan-blue filter, a 0.30 density cyan-blue filter, a 0.60 density cyan-blue filter and a 0.90 density cyan-blue filter;

a cyan-green filter group comprising a 0.15 density cyan-green filter, a 0.30 density cyan-green filter, a 0.60 density cyan-green filter and a 0.90 density cyan-green filter; and

a yellow-red filter group comprising a 0.15 density yellow-red filter, a 0.30 density yellow-red filter, a 0.60 density yellow-red filter and a 0.90 density yellow-red filter;

a yellow-green filter group comprising a 0.15 density yellow-green filter, a 0.30 density yellow-green filter, a 0.60 density yellow-green filter and a 0.90 density yellow-green filter;

a magenta-red filter group comprising a 0.15 density magenta-red filter, a 0.30 density magenta-red filter, a 0.60 density magenta-red filter and a 0.90 density magenta-red filter; and

a magenta-blue filter group comprising a 0.15 density magenta-blue filter, a 0.30 density magenta-blue filter, a 0.60 density magenta-blue filter and a 0.90 density magenta-blue filter.

4. A photographic lighting system according to claim 1 wherein said filter light source comprises at least two lighting filters selected from said filter system and wherein said lighting filters are superimposed over each other in front of said second light source.

5. A photographic system for making motion pictures, said system comprising:

a) a first light source; and

b) a filtered light source comprising;

a second light source; and

a lighting filter located in front of said second light source, said lighting filter being selected from a filter system comprising;

a blue filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density blue filter, a 0.30 density blue filter, a 0.60 density blue filter and a 0.90 density blue filter;

a green filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density green filter, a 0.30 density green filter, a 0.60 density green filter and a 0.90 density green filter;

a red filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density red filter, a 0.30 density red filter, a 0.60 density red filter and a 0.90 density red filter;

a scene which is illuminated by said first light source and said filtered light source to produce an illuminated scene; and

a motion picture camera for recording images of said illuminated scene.

6. A photographic system for making motion pictures according to claim 5 wherein said filter system further comprises:

a yellow filter group comprising a 0.15 density yellow filter, a 0.30 density yellow filter, a 0.60 density yellow filter and a 0.90 density yellow filter;

a magenta filter group comprising a 0.15 density magenta filter, a 0.30 density magenta filter, a 0.60 density magenta filter and a 0.90 density magenta filter; and

a cyan filter group comprising a 0.15 density cyan filter, a 0.30 density cyan filter, a 0.60 density cyan filter and a 0.90 density cyan filter.

7. A photographic system for making motion pictures according to claim 6 wherein said filter system further comprises:

a cyan-blue filter group comprising a 0.15 density cyan-blue filter, a 0.30 density cyan-blue filter, a 0.60 density cyan-blue filter and a 0.90 density cyan-blue filter;

a cyan-green filter group comprising a 0.15 density cyan-green filter, a 0.30 density cyan-green filter, a 0.60 density cyan-green filter and a 0.90 density cyan-green filter; and

a yellow-red filter group comprising a 0.15 density yellow-red filter, a 0.30 density yellow-red filter, a 0.60 density yellow-red filter and a 0.90 density yellow-red filter.

a yellow-green filter group comprising a 0.15 density yellow-green filter, a 0.30 density yellow-green filter, a 0.60 density yellow-green filter and a 0.90 density yellow-green filter;

a magenta-red filter group comprising a 0.15 density magenta-red filter, a 0.30 density magenta-red filter, a 0.60 density magenta-red filter and a 0.90 density magenta-red filter; and

a magenta-blue filter group comprising a 0.15 density magenta-blue filter, a 0.30 density magenta-blue filter, a 0.60 density magenta-blue filter and a 0.90 density magenta-blue filter.

8. A photographic system for making motion pictures according to claim 5 wherein said filter light source comprises at least two lighting filters selected from said filter system and wherein said lighting filters are superimposed over each other in front of said second light source.

9. A method of motion picture photography comprising the steps of:

a) providing a first source which emits visible radiation;

b) providing a filtered light source comprising;

a second light source; and

a lighting filter located in front of said second light source, said lighting filter being selected from a filter system comprising;

a blue filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density blue filter, a 0.30 density blue filter, a 0.60 density blue filter and a 0.90 density blue filter;

a green filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density green filter, a 0.30 density green filter, a 0.60 density green filter and a 0.90 density green filter;

a red filter group comprising four separate filters wherein each of said separate filters has a uniform density and wherein said filter group consists of a 0.15 density red filter, a 0.30 density red filter, a 0.60 density red filter and a 0.90 density red filter;

illuminating a scene with said first source and said filtered light source to produce an illuminated scene; and

recording images of said illuminated scene.

10. A method of motion picture photography according to claim 9 wherein said filter system further comprises:

a yellow filter group comprising a 0.15 density yellow filter, a 0.30 density yellow filter, a 0.60 density yellow filter and a 0.90 density yellow filter;

a magenta filter group comprising a 0.15 density magenta filter, a 0.30 density magenta filter, a 0.60 density magenta filter and a 0.90 density magenta filter; and

a cyan filter group comprising a 0.15 density cyan filter, a 0.30 density cyan filter, a 0.60 density cyan filter and a 0.90 density cyan filter.

11. A method of motion picture photography according to claim 9 wherein said filter system further comprises:

a cyan-blue filter group comprising a 0.15 density cyan-blue filter, a 0.30 density cyan-blue filter, a 0.60 density cyan-blue filter and a 0.90 density cyan-blue filter;

a cyan-green filter group comprising a 0.15 density cyan-green filter, a 0.30 density cyan-green filter, a 0.60 density cyan-green filter and a 0.90 density cyan-green filter; and

a yellow-red filter group comprising a 0.15 density yellow-red filter, a 0.30 density yellow-red filter, a 0.60 density yellow-red filter and a 0.90 density yellow-red filter;

a yellow-green filter group comprising a 0.15 density yellow-green filter, a 0.30 density yellow-green filter, a 0.60 density yellow-green filter and a 0.90 density yellow-green filter;

a magenta-red filter group comprising a 0.15 density magenta-red filter, a 0.30 density magenta-red filter, a 0.60 density magenta-red filter and a 0.90 density magenta-red filter; and

a magenta-blue filter group comprising a 0.15 density magenta-blue filter, a 0.30 density magenta-blue filter, a 0.60 density magenta-blue filter and a 0.90 density magenta-blue filter.

12. A method of motion picture photography according to claim 9 wherein said filter light source comprises at least two lighting filters selected from said filter system and wherein said lighting filters are superimposed over each other in front of said second light source.