GB801871A - Improvements in infra-red apparatus for measuring distances - Google Patents

Improvements in infra-red apparatus for measuring distances

Info

Publication number
GB801871A
GB801871A GB1219255A GB1219255A GB801871A GB 801871 A GB801871 A GB 801871A GB 1219255 A GB1219255 A GB 1219255A GB 1219255 A GB1219255 A GB 1219255A GB 801871 A GB801871 A GB 801871A
Authority
GB
United Kingdom
Prior art keywords
reflected
receiver
mirror
radiation
aircraft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1219255A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRINRO Ltd
Original Assignee
BRINRO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BRINRO Ltd filed Critical BRINRO Ltd
Publication of GB801871A publication Critical patent/GB801871A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/46—Indirect determination of position data
    • G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G01S13/913—Radar or analogous systems specially adapted for specific applications for traffic control for landing purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

801,871. Determining height of aircraft by radiation beams. BRINRO, Ltd. April 27, 1955 [May 6, 1954], No. 12192/55. Class 40 (3). The height of an aircraft is determined by projecting a modulated beam of infrared radiation from a source S to the ground and receiving the radiation on a receiver E sensitive to the modulation frequency. Either transmitter S or receiver E is then made movable about an axis perpendicular to the line joining them and the angular position of that element when the receiver receives the reflected rays is an indication of the height of the aircraft. Figure 2 shows an arrangement for modulating the light beam. The infra-red source 2 is indicated at one focus of an ellipsoidal mirror 3 and a motor - driven chopping disc 5 rotates in the other focal plane to which the infra-red rays are reflected. The modulated beam strikes convex mirror 6, is reflected on to parabolic mirror 7 and projected as a modulated beam of parallel rays. Fig. 3 shows the arrangement for scanning the field of view of the receiver and consists of a pair of coupled mirrors 8, 10, oscillated by a crank mechanism driven by motor 13. Radiation reflected from the ground is reflected from mirror 9 to mirror 10 and then on to the radiation sensitive device 8 which is fixed. Indicating system.-Motor 13 oscillating mirrors 9, 10 also rotates magnet 16 generating in coils 17 sinusoidal voltages which produce a linear sweep in cathode-ray tube 17. Signals produced in infra-red receiver cell 8 are applied to amplifier 20, 21 which include a filter 22 wired to the modulation frequency of the light incident on the cell. The output pulses produced by the cell as its scanning mirrors oscillate across the portion of the beam on the ground are arranged to make the trace visible so that the position of the pulse along the screen of the C.R.T. indicates the height of the aircraft.
GB1219255A 1954-05-06 1955-04-27 Improvements in infra-red apparatus for measuring distances Expired GB801871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU32851 1954-05-06

Publications (1)

Publication Number Publication Date
GB801871A true GB801871A (en) 1958-09-24

Family

ID=19722267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1219255A Expired GB801871A (en) 1954-05-06 1955-04-27 Improvements in infra-red apparatus for measuring distances

Country Status (6)

Country Link
BE (1) BE537749A (en)
CH (1) CH325145A (en)
FR (1) FR1123492A (en)
GB (1) GB801871A (en)
LU (1) LU32851A1 (en)
NL (2) NL232869A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143396A (en) * 1983-05-21 1985-02-06 Mac Co Ltd Beam riding location system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143396A (en) * 1983-05-21 1985-02-06 Mac Co Ltd Beam riding location system

Also Published As

Publication number Publication date
FR1123492A (en) 1956-09-21
NL232869A (en)
LU32851A1 (en)
CH325145A (en) 1957-10-31
BE537749A (en)
NL197019A (en)

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