1
Erwin Sick, Gunter Fetzer: Light grid arrangement using cyclically switched semiconductor light sources. Erwin Sick Optik Elektronik, Townsend and Townsend, January 12, 1982: US04310756 (31 worldwide citation)

A light grid arrangement features a row of light emitting diodes 0 to 9 which are periodically switched on one after the other by a ring counter 11 and are arranged to direct their light through a monitoring region 23 towards an image forming optical means which is conveniently in the form of a conc ...


2
Erwin Sick: Optical apparatus. Erwin Sick Gesellschaft mit beschrankter Haftung Optik Elektronik, November 28, 1978: US04127771 (26 worldwide citation)

Optical apparatus for extending a light curtain, using a light beam shifted periodically laterally parallel to itself onto an array of plane mirrors at an angle to the beam, the span of the array normal to the emergent reflected beam being greater than its span normal to the incident beam.


3
Erwin Sick, Klaus Hartman: Optical apparatus for producing a light curtain. Erwin Sick Optik Elektronik, October 4, 1977: US04052120 (25 worldwide citation)

An optical apparatus for producing a light curtain using a fibre optic rod with a sawtooth mirror disposed along the face away from the curtain area.


4
Erwin Sick: Solar mirror apparatus. Erwin Sick Optik Elektronik, Townsend & Townsend, April 11, 1989: US04820033 (22 worldwide citation)

The solar mirror apparatus has an elongate support frame on which resiliently flexible sheet metal mirrors (15) are secured in a parabolically curved arrangement, with an elongate solar radiation receiver (28) being mounted at the focal line of the sheet metal mirrors (15). The support frame is swiv ...


5
Erwin Sick, Klaus Hartmann, Heinz Henneberger: Photo electric light detection devices. Erwin Sick Gesellschaft mit beschrankter Haftung Optik Elektronik, December 25, 1979: US04180702 (22 worldwide citation)

A photo electric light detection device comprising an array of photodiodes is disposed at an end face of a light conducting rod in order to produce an output signal proportional to light incident on the surface of the rod and transmitted to the end face by total internal reflection. The array of pho ...


6
Erwin Sick: Optical fault seeking apparatus. Erwin Sick Optik Elektronik, June 9, 1987: US04671663 (19 worldwide citation)

An optical fault seeking apparatus has a light scanning apparatus (21) and a light line receiving apparatus (14) which receive the light reflected from the material to be investigated and direct it onto a photoelectric converter. The light beam which forms the light line 11 impinges at an acute angl ...


7
Erwin Sick: Optical apparatus. Erwin Sick Gesellschaft mit beschrankter Haftung Optik Elektronik, January 1, 1980: US04181398 (17 worldwide citation)

A light smoothing device for rendering a non uniform distribution of light more uniform especially suited for use in line scanning in combination with a light conducting rod which transmits light incident on its surface to its end faces for subsequent detection. The smoothing device has an optical p ...


8
Erwin Sick: Detection apparatus for finding holes in webs. Erwin Sick Optik Elektronik, November 24, 1981: US04302105 (17 worldwide citation)

Detection apparatus for finding holes in moving webs uses a row of individual mutually sideways displaced stepped mirror strips in combination with a scanning device which periodically scans a light beam from a laser over the individual mirrors of each strip, to generate a scanning light curtain dir ...


9
Erwin Sick, Dieter Ross, Siegfried Mankel: Monitoring apparatus. Erwin Sick Optik Elektronik, Townsend & Townsend, February 14, 1984: US04431309 (14 worldwide citation)

A light beam 2 from a laser light source 30 is split by a beam splitting arrangement 21, 22 into two slightly convergent light beams which are deflected by a deflecting mirror 31 onto the surface of a mirror wheel 23. The mirror wheel 23 that deflects these light beams via deflecting mirrors 24', 25 ...


10
Erwin Sick: Device for concentrating light from a linear field on to a receiver. Erwin Sick Gesellschaft mit beschrankter Haftung Optik Elektronik, September 26, 1978: US04116527 (14 worldwide citation)

An apparatus for concentrating light from a linear field on to a relatively small receiver disposed at the end of a rod light guide on the peripheral surface of which light emanating from the linear field is directed. The linear field is arranged substantially at the focal distance from a first conc ...