Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Two wavelength optical sensor and sensing system

Two wavelength optical sensor and sensing system

US Patent 4931636 · Granted Jun 5, 1990

Estimated economic value: $19,463,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Optical sensor using swept wavelength light source1997
Method for maximizing the solar cell OPTO-electronic conversion efficiency in op1996
Planar waveguide spectrograph1996
Optical angle sensor using polarization techniques1995
Multitrack multilevel sensing system1993
Optical fiber mount1993
Multitrack multilevel sensing system with error detecting1991
Optical source for optical sensing system1991
Optical sensor using concave diffraction grating1991
Multi-track analog optical sensing system and method1990
Wavelength division multiplexing system using optical switch1990
Variable light transmission filter and optical analog position sensor1990