United Technologies Corporation

Jason M Gordon

Peter E Raber

Michael J Brienza

An optical system having a spherical mirror is used to collect light from the surface of a turbine blade or the like which is to be contoured. The spherical mirror is located at an equal optical distance from both the test specimen and the linear diode array so that it operates at a one-to-one magnification ratio. The linear diode array is positioned behind the spherical mirror and it receives light focused by the mirror and reflected by a beam splitter through an opening in the center of the mirror. None of the optical elements of the inspection system are located in the plane of movement of the test specimen so that even particularly long items such as a helicopter rotor blade can be contoured. Indentical upper and lower optical systems allows both surfaces of the test specimen to be contoured simultaneously and each system is independently operable and oriented to prevent optical interference. An automatic gain control is provided to adjust the optical modulator so that the effective intensity of the spot presented to the diode array is maintained within predetermined limits.

Optical inspection system employing spherical mirror

An optical designator system employs a remote source of electromagnetic energy, such as a small hand-held infrared LED or the like, to generate an identifying beam which is directed to the same faceplate through which a displayed image is viewed. A diffuser medium is disposed at the image plane along the rear surface of the faceplate and scatters the incident beam of electromagnetic energy toward orthogonal pairs of photodetectors located adjacent to the edges of the faceplate. The output signals from the photodetectors are presented to a normalizer circuit which compensates for intensity variations of the source of electromagnetic energy into the faceplate. Therefore, the output signal from each normalizer circuit varies in a relationship which is proportional to the distance between the photodetectors at which the incident beam strikes the diffuser medium. The remote energy source is preferably modulated with a waveform which is discernible both from background ambient light and that of the displayed image. Optical and electrical filters associated with the photodetectors insure that normalizer circuits respond only to electromagnetic energy from the remote source.

Remote optical display designator

An optical system having a single spherical mirror for collecting light from two directions combined by a beam splitter after the light has been scattered from the surface of a turbine blade or the like. The spherical mirror is located at an equal optical distance from both the surface of the test specimen and a linear detector array so that it operates at a one-to-one magnification ratio. The linear detector array receives light focused by the mirror along a path folded by the beam splitter. This arrangement is helpful in contouring the surface of a turbine blade near a vertical obstruction such as a shroud of a turbine blade since the collection axes of the pickup legs view the incident spot from different directions. None of the optical elements of the inspection system are located in the plane of movement of the test specimen so that even particularly long items such as a helicopter rotor blade can be contoured. Identical upper and lower optical systems allow both surfaces of the test specimen to be contoured simultaneously. An automatic gain control is provided to adjust the optical modulator so that the effective intensity of the beam incident on the detector array is maintained within predetermined limits.

Optical inspection system employing dual path pickup system with single

Four six-packs of labeled bottles are picked up and spun while being illuminated by light sources, each of the 24 bottles have an optical sensor focused at a spot through which successive portions of the peripheral surface of the bottle passes as the bottle is spun. The six-packs are fed broadside first; the two center bottles in each six-pack remote from the sensors are illuminated by light, mounted adjacent thereto so that the lights pass between necks of bottles as the assembly approaches the four six-packs to pick them up. Certain of the sensors are longer than others to permit viewing of some bottles underneath the sensors related to other bottles. Each of the bottles is illuminated by a light positioned at an elevation which is substantially different than the elevation of the focus spot on the bottles so that the sensors are substantially insensitive to specular reflection from the shiny bottles, yet provide a substantial amount of light diffusely reflected from labels. Certain of the lights and sensors are arranged in line along the center of the apparatus between adjacent six-packs, and others of the sensors and lights are arranged in lines externally of all of the six-packs. The sensors focus on points which are at least one quarter revolution in advance of the desired stopping position of the bottles with respect to the direction in which the bottle is already spinning.

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Katonah, NY, United States of America

Jason M Gordon