Abstract: The present invention adjusts the relationship of two optical components within an optical coupler by the use of eccentric sleeves. As individual eccentric sleeves of an adjustable subassembly are rotated, they change either the angle or the location of the axis of one optical component relative to the location of the axis of another fixed optical component. Adjustment of the alignment of the optical components therefore requires only the rotation of the sleeves of the adjustable subassembly. Locking the sleeves into a selected adjustment is accomplished by the insertion of a low expansion, quick setting, bonding agent into holes located so that they feed the bonding agent into the spaces between the sleeves. Thus, after the bonding agent has fused together the otherwise movable parts, any further movement of the sleeves is prevented, and the alignment is permanently preserved.

Abstract: Apparatus for measuring torque (or functions derived therefrom or related thereto) transmitted by a shaft driven to rotate and connected to a load. The apparatus includes first and second optically flat, radiation reflecting, surfaces located on the shaft at respective first and second positions displaced from one another axially along the shaft and means for directing beams of radiation from a suitable source at the reflecting surfaces. There are first and second pick-up means spaced from the shaft and located to receive the radiation beams reflected by the respective first and second reflecting surfaces during rotation of the shaft and provide respective first and second outputs as a result of the radiation beams directed thereat by the reflecting surfaces. Signal processing circuit means associated with the first and second outputs provides an output interrelated with angular twist of the shaft at one of said first and second positions relative to the other.

Abstract: A device for controlling light transmission through an opening in which a pair of spaced planar parallel films are placed adjacent an opening. The films are selected to have uniformly and linearly varying light transmitting characteristics and are designed to be moved relative to each other, generally in opposite directions, so that a substantially uniform degree of light transmission is achieved over the entire opening area. The films may be either absorptive or reflective and the films may be moved manually or electrically and automatically in response to a sensing and control device.