IT1176280B - Astigmatic non-contact optical probe - Google Patents

Astigmatic non-contact optical probe

Info

Publication number
IT1176280B
IT1176280B IT21288/84A IT2128884A IT1176280B IT 1176280 B IT1176280 B IT 1176280B IT 21288/84 A IT21288/84 A IT 21288/84A IT 2128884 A IT2128884 A IT 2128884A IT 1176280 B IT1176280 B IT 1176280B
Authority
IT
Italy
Prior art keywords
photodetector
astigmatic
probe
distance
optical probe
Prior art date
Application number
IT21288/84A
Other languages
Italian (it)
Other versions
IT8421288A0 (en
IT8421288A1 (en
Inventor
James L Doty
Original Assignee
Spectron Dev Lab Inc
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 Spectron Dev Lab Inc filed Critical Spectron Dev Lab Inc
Priority to IT21288/84A priority Critical patent/IT1176280B/en
Publication of IT8421288A0 publication Critical patent/IT8421288A0/en
Publication of IT8421288A1 publication Critical patent/IT8421288A1/en
Application granted granted Critical
Publication of IT1176280B publication Critical patent/IT1176280B/en

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Abstract

A light generation source (e.g. laser or LED) (14) and a collimating lens project a beam (16) through crossed cylindrical lenses (18,20) to induce astigmatism in the beam. The astigmatic beam is then directed onto a target surface (30) to be mapped via a beam splitter (28). The back-scattered radiation (32) reflected from the target surface is collected by an imaging lens (34) and focused onto a photodetector (36). The photodetector comprises quadrant sensors. The shape of the image projected onto the photodetector is dependent upon the distance between the probe and surface. By observing the output of the detector the distance between the probe and surface may be measured, or maintained constant.
IT21288/84A 1984-06-07 1984-06-07 Astigmatic non-contact optical probe IT1176280B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT21288/84A IT1176280B (en) 1984-06-07 1984-06-07 Astigmatic non-contact optical probe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT21288/84A IT1176280B (en) 1984-06-07 1984-06-07 Astigmatic non-contact optical probe

Publications (3)

Publication Number Publication Date
IT8421288A0 IT8421288A0 (en) 1984-06-07
IT8421288A1 IT8421288A1 (en) 1985-12-07
IT1176280B true IT1176280B (en) 1987-08-18

Family

ID=11179587

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21288/84A IT1176280B (en) 1984-06-07 1984-06-07 Astigmatic non-contact optical probe

Country Status (1)

Country Link
IT (1) IT1176280B (en)

Also Published As

Publication number Publication date
IT8421288A0 (en) 1984-06-07
IT8421288A1 (en) 1985-12-07

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