Patent US5801866A successfully refreshed from Google Patents.
US5801866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser communication device
Assignee: Trex Communications Corp
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Filing: 1996-06-21
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Granted: 1998-09-01
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Expires: 2016-06-21
Abstract
Abstract A portable laser communication transceiver for transmitting and receiving information imposed on laser beams. A communication signal is imposed on a laser beam having a divergence of between 1 degree and 4 degrees. The beam is directed by an operator, sighting through a telescopic viewing device, at a distant transceiver which collects light in the laser beam with a. In preferred embodiments, the transceivers are handheld and each comprises a microphone and earphones allowing operators to talk with each other. Digital information can also be transmitted from personal computers and other electronic information equipment at the location of each operator. In a preferred embodiment useful for military and surveying applications, a GPS, a compass and a laser ranging system is provided. This enables the operator to sight through a binocular to a target and determine its position in longitude, latitude and elevation. Target position information can then be transmitted to a distant transceiver which in this case could be a base transceiver.
Inventors
- 👤 Victor Chan
- 👤 Michael Rivers
- 👤 James Menders
- 👤 Scott Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:08
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/11; H04B10/114; H04B10/1143; H04B10/118
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
196 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) at least one laser operable to produce a signal laser beam of a selected range of wavelengths; 2) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver; and D) a laser ranging unit, a GPS unit and an electronic compass.
Claim 2
Dependent Claim
196 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) at least one laser operable to produce a signal laser beam of a selected range of wavelengths; 2) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver; and D) a laser ranging unit, a GPS unit and an electronic compass.
Claim 3
Dependent Claim
13 words
A laser communication transceiver as in claim 1 further comprising a tilt gage.
Claim 4
Dependent Claim
14 words
A laser communication transceiver as in claim 1 further comprising a microphone and earphones.
Claim 5
Dependent Claim
16 words
A transceiver as in claim 1 further comprising a video camera and an electronic view finder.
Claim 6
Dependent Claim
10 words
A transceiver as in claim 1 further comprising a speaker.
Claim 7
Dependent Claim
45 words
A transceiver as in claim 1 wherein said laser receiver comprises a photo diode, a preamplifier, a frequency to voltage converter and a data converter for detecting said communication signal and distinguishing said signal as sound or digital data suitable for input to a computer.
Claim 8
Dependent Claim
16 words
A laser communication transceiver as in claim 1 wherein said telescopic viewing device comprises a binocular.
Claim 9
Dependent Claim
207 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) a Voight filter; 2) at least one laser disposed relative to said Voight filter and operable to produce a signal laser beam of a narrow band of wavelengths which is locked at or near 852.11 nm using said Voight filter; 3) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
Claim 10
Dependent Claim
207 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) a Voight filter; 2) at least one laser disposed relative to said Voight filter and operable to produce a signal laser beam of a narrow band of wavelengths which is locked at or near 852.11 nm using said Voight filter; 3) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
Claim 11
Dependent Claim
204 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) at least one laser operable to produce a signal laser beam of a selected range of wavelengths; 2) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an atomic line filter configured to provide a noise equivalent bandwidth of less than 0.1 nm and to have a transmission band closely matched to at least one wavelength of said received laser beam; 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said atomic line filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
Claim 12
Dependent Claim
204 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) at least one laser operable to produce a signal laser beam of a selected range of wavelengths; 2) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an atomic line filter configured to provide a noise equivalent bandwidth of less than 0.1 nm and to have a transmission band closely matched to at least one wavelength of said received laser beam; 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said atomic line filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
Claim 13
Dependent Claim
26 words
A laser communication transceiver as in claim 9, wherein said narrow band of wavelengths is produced with a distributed Bragg reflector laser diode with feedback control.
Claim 14
Dependent Claim
16 words
A transceiver as in claim 9 where said receiver atomic line filter is a Faraday filter.
Claim 15
Dependent Claim
16 words
A transceiver as in claim 9, wherein said receiver atomic line filter is a Voight filter.
Claim 16
Dependent Claim
207 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) a Faraday filter; 2) at least one laser disposed relative to said Faraday filter and operable to produce a signal laser beam of a narrow band of wavelengths which is locked at or near 852.11 nm using said Faraday filter; 3) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
Claim 17
Dependent Claim
207 words
A laser communication transceiver for transmitting information via laser beams to another laser communication transceiver and for receiving information via laser beams from said another laser communication transceiver, said transceiver comprising: A) a laser transmitter system comprising: 1) a Faraday filter; 2) at least one laser disposed relative to said Faraday filter and operable to produce a signal laser beam of a narrow band of wavelengths which is locked at or near 852.11 nm using said Faraday filter; 3) a signal modulator disposed relative to said laser and configured to modulate said signal laser beam to impose a digital communication signal on said signal laser beam; B) a laser receiver disposed relative to said laser transmitter system and configured to receive a laser beam having a selected range of wavelengths from said another laser communication transceiver comprising: 1) an optical filter closely matched to at least one wavelength of said received laser beam, 2) a signal detector operable to receive and detect communication signals that are transmitted by said another laser communication transceiver through said optical filter; and C) a telescopic viewing device operable to locate said another similar laser communication transceiver and to facilitate pointing said transceiver in a direction of said another laser communication transceiver.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |