Industry Patents
Patent: 6700690
Tunable Variable Bandpass Optical Filter
(Click image for PDF of full patent)
| Patent Number: |
6700690 |
| Title: |
Tunable Variable Bandpass Optical Filter |
| Abstract: |
A variable bandwidth tunable optical filters comprised of two transparent
optical substrates, upon each of which is deposited a linearly variable
multilayer interference filter coating which varies in total thickness
from end to end in a wedged fashion. This wedge imparts a corresponding
variation of the center wavelength of the filter bandpass with respect to
the linear position of the coated filter substrates. The variable bandpass
tunable filter can be adjusted to a specific center wavelength by moving
the filter pair together linearly through the incident beam. The bandwidth
of the filter pair is maximized when the two filters are spectrally
aligned, and is determined by the bandwidth of the individual filters. The
variable bandwidth of the tunable filter can be adjusted by introducing a
relative linear offset between the linearly variable filter pair.
|
| Country of Issue: |
US |
| First Named Inventor: |
Buchsbaum, Lane |
| Assignee: |
Ocean Optics |
| Continuation or Divisional of: |
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| International Classification: |
G02B 26/02 |
| US Classification: |
359/230 |
| Issue Date: |
03-02-2004 |
| Filing Date: |
10-02-2001 |
| Application : |
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| Notes: |
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| Link to Patent at freepatentsonline.com: |
6700690 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6700690 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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