Abstract: An autostereoscopic display includes a projection system which generates a plurality of real images that represent different spatial views of an object and further includes a plurality of contiguous field lenses. From the real images, the field lenses form a plurality of exit pupils which are separated by one interpupillary distance. An observer can "walk around" the display and observe different stereoscopic views of the object by positioning his eyes at an adjacent pair of exit pupils.

Abstract: In one embodiment of the present invention, the automotive display apparatus has two concave mirrors arranged below the windshield in such a way that light from the display of an indicator which shows driving condition information such as car speed is reflected by one of the concave mirrors toward the other concave mirror, which then reflects the light toward the windshield that further directs it toward the driver's seat. A drive can thus see a remotely formed virtual display image within a viewing field of the windshield. The first concave mirror, which directly receives light from the indicator and reflects it toward the second concave mirror, is mounted on a plane mirror in such a manner that it can be moved into or out of a light path that extends from the indicator to the second concave mirror. When the first concave mirror is in the light path, the display image is magnified and hence the virtual display image is formed at a remote position from the driver.

Abstract: An optical system for forming two separate images. A beamsplitter disposed in the path of a converging or diverging beam of light forms a reflected image and transmitted image. A thin positive lens disposed in the path of the transmitted beam of light selectively corrects the transmitted image for any or all of the following problems--spherical aberrations, coma, astigmatism, longitudinal and lateral color.

Abstract: A mirror is aligned on a laser tube using an apparatus comprising a window spaced from the mirror and a means for containing fluid, such as a bellows, between the window and the mirror. The window and the fluid have an index of refraction that matches that of the mirror. The bellows permits the mirror's relation to the window to be changed without the loss of the fluid. In aligning the lasing mirror, the window is oriented normal to a light beam from an autocollimator. The mirror is then placed in contact with the laser tube and oriented so that the beam from the autocollimator is reflected back on itself.