Device for full spectrum polarized lighting system

• US 5,184,881 A
• Filed: 10/24/1991
• Issued: 02/09/1993
• Est. Priority Date: 03/07/1990
• Status: Expired due to Term

• Current Assignee: Daniel N. Karpen
• Original Assignee: Daniel N. Karpen
• Inventors: Karpen, Daniel N.
• Primary Examiner(s): Cole, Richard R.
• Application Number:
  US07/781,844
• Time in Patent Office: 474 Days
• Field of Search: 362/1, 362/2, 362/19, 362/217, 362/223, 362/260, 362/267, 362/253, 362/147, 362/404
• US Class Current: 362/1
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 9/02 for simulating daylight F21V9/04, F21V9/06 take precedence
• CPC Class Codes: F21V 9/14 for producing polarised light
• CPC Class Codes: F21W 2131/402 for working places
• CPC Class Codes: F21Y 2103/00 Elongate light sources, e.g. fluorescent tubes
• CPC Class Codes: F21Y 2113/00 Combination of light sources

Abstract

A full spectrum polarized lighting fixture for general commercial, institutional, and industrial use, and for use in offices with computer terminals and video display terminals. The lighting fixture contains an electronic solid state ballast, a polarizing lense, and a full spectrum color corrected lamp. The lense is a polarized diffuser to provide glare free light with excellent contrast. The fixture contains a full spectrum color corrected lamp to simulate daylight. The combination of the full spectrum lamp and the polarized diffuser provides for light with the spectral energy distribution characteristics and light polarization of natural daylight.

Claims

1. A full spectrum polarized fluorescent lighting system which produces artificial light that is of the spectral energy distribution and light polarization characteristics of natural daylight comprising in combination:

a ceiling mounted fluorescent fixture;

a flat multi-layer polarized diffuser mounted in a door of said fixture;

said flat multi-layer polarized diffuser is mounted in said door with a top prism side towards one or more full spectrum lamps and a smooth bottom side facing towards objects being illuminated;

said fixture includes a means for providing light which is glare free and preferentially vertically polarized;

said means comprises said multi-layer polarized diffuser; and

said full spectrum fluorescent lamps mounted inside said fixture;

said full spectrum fluorescent lamps comprise a means for providing light of excellent color rendition matching the spectral energy distribution of natural daylight;

said full spectrum fluorescent lamps being full spectrum fluorescent lamps with a color rendition index of 90 or above and a correlated color temperature of 5,000 degrees Kelvin or above; and

a gasket mounted on a door frame of said fluorescent fixture between said door and said door frame;

said gasket comprises a means to keep dirt and dust out of said fixture and from collecting on the said top prism surface facing towards said full spectrum fluorescent lamps of said multi-layer polarized diffuser;

said gasketing materials are ultraviolet resistant; and

a fixture housing free of ventilation holes;

said fluorescent fixture to be sealed for dust and light leaks; and

a solid state electronic ballast;

said ballast comprises a means of providing flicker free lighting;

said means including said solid state ballast.

2. The full spectrum polarized lighting system as in claim 1 whereas said full spectrum fluorescent lamps are F40/T10.

3. The full spectrum polarized lighting system as in claim 1 whereas said full spectrum fluorescent lamps are F40/T12.

4. The full spectrum polarized lighting system as in claim 1 whereas said full spectrum fluorescent lamps are F32/T8.

5. The full spectrum polarized lighting system as in claim 1 whereas said ceiling mounted fluorescent fixture is troffer mounted.