Browse Prior Art Database

OPTICAL MEASURING ARRANGEMENTS

IP.com Disclosure Number: IPCOM000023448D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 231K

Publishing Venue

Xerox Disclosure Journal

Abstract

An apparatus for measuring small defects in a specular surface uses a laser scanning system as shown in Figures 1 and 2 which shines a narrow beam tangentially across the surface of the specular surface of a roller 21 to be inspected. Small de-fects, shown exaggerated in Figure 3, are detected by the time such defects obscure the laser beam. Using the time period of obscurity of the laser beam, the heights of the defects (the speed of rotation of the roller 21 being known) are computed.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

OPTICAL MEASURING ARRANGEMENTS
ProposedRobert Noel West Classification

U0S~ Cl. 178/7.6
Int. Cl. H04n 3/00

/7F/G~2

I2

23~

4:

J7 L

x

D

Volume 2 Number 5 September/October 1977 63

FIG.3

[This page contains 1 picture or other non-text object]

Page 2 of 2

OPTICAL MEASURING ARRANGEMENTS (Cont~d)

An apparatus for measuring small defects in a specular surface
uses a laser scanning system as shown in Figures 1 and 2 which
shines a narrow beam tangentially across the surface of the
specular surface of a roller 21 to be inspected. Small de~
fects, shown exaggerated in Figure 3, are detected by the time
such defects obscure the laser beam. Using the time period of
obscurity of the laser beam, the heights of the defects (the
speed of rotation of the roller 21 being known) are computed.

                 XEROX DISCLOSURE JOURNAL
64 Volume 2 Number 5 September/October 1977

[This page contains 1 picture or other non-text object]