JPS5575669A - Measurement unit for mobile speed for moving particle - Google Patents

Measurement unit for mobile speed for moving particle

Info

Publication number
JPS5575669A
JPS5575669A JP14890178A JP14890178A JPS5575669A JP S5575669 A JPS5575669 A JP S5575669A JP 14890178 A JP14890178 A JP 14890178A JP 14890178 A JP14890178 A JP 14890178A JP S5575669 A JPS5575669 A JP S5575669A
Authority
JP
Japan
Prior art keywords
light flux
measuring point
light
eyeground
pin hole
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.)
Granted
Application number
JP14890178A
Other languages
Japanese (ja)
Other versions
JPH0126697B2 (en
Inventor
Shibuo Okamoto
Shinichi Nishimura
Takashi Yokokura
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.)
Tokyo Optical Co Ltd
Original Assignee
Tokyo Optical Co 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 Tokyo Optical Co Ltd filed Critical Tokyo Optical Co Ltd
Priority to JP14890178A priority Critical patent/JPS5575669A/en
Publication of JPS5575669A publication Critical patent/JPS5575669A/en
Publication of JPH0126697B2 publication Critical patent/JPH0126697B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave

Abstract

PURPOSE:To make agreement two light flux to the measuring point easily, by freely inserting the transparent parallel plate in the optical path of laser light at least one between the focussed optical system and the measuring point. CONSTITUTION:The single laser light flux a from the laser oscillator 11 is sectioned into two light flux b1, b2 with the semi-transparent mirror prism 14, emitted to the eyeground 30 to be measured, and the scattered light C from the measuring point of the light flux b1, b2 is received at the photo detector 40 via the pin hole 37. On the other hand, the light from the illumination light source 11 illuminates the eyeground 30 via the pupilary surface 28 of inspected person, and the inspector 44 observes the measurement formed at the position conjugated to the pin hole 37 through the eyepiece lens 43. In this case, the eye lens 29 of body eye is optically ununiform media to cause error easily. But, adjusting independently two parallel plates 20-1 and 20-2, the light flux b1, b2 can surely be in agreement with one point in the eyeground 30 being the measuring point.
JP14890178A 1978-12-01 1978-12-01 Measurement unit for mobile speed for moving particle Granted JPS5575669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14890178A JPS5575669A (en) 1978-12-01 1978-12-01 Measurement unit for mobile speed for moving particle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14890178A JPS5575669A (en) 1978-12-01 1978-12-01 Measurement unit for mobile speed for moving particle

Publications (2)

Publication Number Publication Date
JPS5575669A true JPS5575669A (en) 1980-06-07
JPH0126697B2 JPH0126697B2 (en) 1989-05-25

Family

ID=15463197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14890178A Granted JPS5575669A (en) 1978-12-01 1978-12-01 Measurement unit for mobile speed for moving particle

Country Status (1)

Country Link
JP (1) JPS5575669A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142885A (en) * 1976-04-01 1977-11-29 Nat Res Dev Device for measuring blood flow of retina
JPS5354069A (en) * 1976-10-26 1978-05-17 Nec Corp Laser doppler speedmeter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142885A (en) * 1976-04-01 1977-11-29 Nat Res Dev Device for measuring blood flow of retina
JPS5354069A (en) * 1976-10-26 1978-05-17 Nec Corp Laser doppler speedmeter

Also Published As

Publication number Publication date
JPH0126697B2 (en) 1989-05-25

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