Zenith Radio Corporation

Robert E Slater

Melvin H Boldt

David P Chuboff

Clement W Trottier

Meyer L Sugarman

Optical mirror adjustment means are disclosed for use in a projection television system having a rear projection viewing screen. The means according to the invention provide for adjusting the reflecting angles of a mirror reflecting an aerial image of a projected television image onto the screen. Pivot means provide for tilting the mirror in elevation, and screw means provide for positionally adjusting and fixing the mirror in a desired elevation angle. Screw means attached to the pivot means provide for positioning and fixing the mirror as azimuthally. The optical mirror adjustment means are such that the mirror can be adjusted to reflect the aerial image in precise coincidence onto the viewing screen.

Optical mirror adjustment means for a projection television receiver

Unitary optical assembly means is disclosed for use in an ultra-compact projection television receiver. The unitary optical assembly means is selectively storable in the receiver cabinet and elevatable therefrom by precision elevating means. The receiver includes a stationary optical assembly means permanently enclosed in the lower portion of the cabinet for forming a television image and projecting, when the unitary optical assembly is elevated an aerial image of the television image upwardly a predetermined image projection distance along an optical path folded by optical path folding means. The unitary optical assembly comprises in combination mirror means arranged at a predetermined angle effective to receive the aerial image and reflect the image forwardly. The unitary optical assembly also comprises rear projection screen means located at the terminus of the optical path and vertically arranged for receiving said aerial image reflected by the mirror means for displaying the image. A rigid, box-like shroud means provides for mounting the mirror at a predetermined angle and in a predetermined fixed relationship to the screen. The unitary optical assembly according to the invention provides for maintaining the mirror and the screen in predetermined fixed relationship one with the other, and when said unitary optical assembly is elevated, the assembly provides for establishing and maintaining the mirror and the screen in predetermined fixed relationship with the stationary optical assembly means.

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Vernon Hills, IL, United States of America

Robert E Slater