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- From: bill@pauli.lv-physics.nevada.edu (Bill ODonnell)
- Newsgroups: sci.electronics
- Subject: Laser Radar Detector Questions
- Message-ID: <1993Jan24.174954.18163@unlv.edu>
- Date: 24 Jan 93 17:49:54 GMT
- Sender: news@unlv.edu (News User)
- Organization: UNLV Department of Physics
- Lines: 21
-
-
- I am a grad student taking a laser applications course
- and was assigned a project to design a laser radar detector.
-
- What I need to know is:
-
- 1) Do they use Doppler, time of flight, or both?
- 2) If time of flight, what is the rep rate of the pulses?
- 3) If Doppler, what frequency is the carrier modulated at?
- 4) What is the wavelength of the laser used?
-
- An old Popular Science (Sep. 90) reported that the time of flight
- method was used with a pulse every 3ms. My own opinion is that
- Doppler isn't used because very high modulation frequencies would
- be needed for good accuracy.??? If anyone knows of a standard or
- the specs of a specific brand a short message would be very
- helpful.
-
-
- Thanks in advance,
- Bill O'Donnell
-