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Class Information
Number: 359/890
Name: Optical: systems and elements > Absorption filter > Superimposed or series
Description: Subject matter wherein two or more filters are disposed so that ray energy may pass through all the filters in series.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7557992 |
Multi-mode color filter |
Jul. 7, 2009 |
| 7440205 |
Variable intensity dimmer |
Oct. 21, 2008 |
| 7229684 |
Light-stable colored transparent composite films |
Jun. 12, 2007 |
| 7071457 |
Optical filter stack |
Jul. 4, 2006 |
| 6953618 |
Light-stable colored transparent composite films |
Oct. 11, 2005 |
| 6918673 |
Protective optical filter assembly |
Jul. 19, 2005 |
| 6891686 |
Medium for a color changer |
May. 10, 2005 |
| 6851804 |
Readjustable optical elements |
Feb. 8, 2005 |
| 6813087 |
Multi-mode color filter |
Nov. 2, 2004 |
| 6769792 |
High intensity lighting projectors |
Aug. 3, 2004 |
| 6721477 |
Dispersion-free optical filters |
Apr. 13, 2004 |
| 6687063 |
Optical system for creating colored fields of light and components therefor |
Feb. 3, 2004 |
| 6666944 |
Method of manufacturing optical filter |
Dec. 23, 2003 |
| 6639723 |
Variable optical attenuator with polarization compensation |
Oct. 28, 2003 |
| 6614606 |
Methods and apparatus for providing color images from monochromatic night vision and other electro-optical viewing devices |
Sep. 2, 2003 |
| 6554454 |
Filter, illumination device and illumination method |
Apr. 29, 2003 |
| 6532059 |
Surveying instrument having an optical distance meter |
Mar. 11, 2003 |
| 6504661 |
Optical device with protected thin optical films |
Jan. 7, 2003 |
| 6481851 |
Adjustable contrast reflected display system |
Nov. 19, 2002 |
| 6481625 |
Laser scanning bar code symbol reader employing variable pass-band filter structures having frequency response characteristics controlled by time-measurement of laser-scanned bar code symbol |
Nov. 19, 2002 |
| 6411451 |
Laser protection system |
Jun. 25, 2002 |
| 6334924 |
Method of manufacturing optical filter |
Jan. 1, 2002 |
| 6278563 |
Scrolling color changer |
Aug. 21, 2001 |
| 6263166 |
Exposure count indicator for camera |
Jul. 17, 2001 |
| 6259864 |
Exposure count indicator for camera |
Jul. 10, 2001 |
| 6259572 |
Photographic color effects lighting filter system |
Jul. 10, 2001 |
| 6249372 |
Fluorescent conversion filter and color display device using the same |
Jun. 19, 2001 |
| 6218194 |
Analytical methods and apparatus employing an optical sensor device with refractive index modulation |
Apr. 17, 2001 |
| 6204941 |
Optical filtering device |
Mar. 20, 2001 |
| 6078442 |
ND filter |
Jun. 20, 2000 |
| 6076932 |
Light absorber and optical equipment |
Jun. 20, 2000 |
| 6028724 |
Absorbent laser resistant structure |
Feb. 22, 2000 |
| 6021008 |
Beam scattering laser resistant structure |
Feb. 1, 2000 |
| 6016232 |
Heat conducting laser resistant structures |
Jan. 18, 2000 |
| 6014274 |
Partially ablating laser resistant structures |
Jan. 11, 2000 |
| 5986828 |
Optical power limiter utilizing nonlinear refraction |
Nov. 16, 1999 |
| 5953169 |
Rotary drum type optical filter apparatus |
Sep. 14, 1999 |
| 5838508 |
Color filter and process for fabricating the same and electro-optical device |
Nov. 17, 1998 |
| 5795058 |
Color image protection apparatus |
Aug. 18, 1998 |
| 5790329 |
Color changing device for illumination purposes |
Aug. 4, 1998 |
| 5687263 |
Optical RF bandpass filter and method for manufacturing same |
Nov. 11, 1997 |
| 5587847 |
Laser protection window using holographic optical element and channel plates |
Dec. 24, 1996 |
| 5543628 |
Quantum well infrared filter |
Aug. 6, 1996 |
| 5541735 |
Method and mechanism for selecting colored items related to optical capabilities of animals |
Jul. 30, 1996 |
| 5542010 |
Rapidly tunable wideband integrated optical filter |
Jul. 30, 1996 |
| 5521759 |
Optical filters for suppressing unwanted reflections |
May. 28, 1996 |
| 5502595 |
Color filters and their preparation |
Mar. 26, 1996 |
| 5481381 |
Color image reading apparatus |
Jan. 2, 1996 |
| 5461516 |
Multilayer film structure |
Oct. 24, 1995 |
| 5453883 |
Apparatus for producing a monochromatic light beam |
Sep. 26, 1995 |
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