R. V. Pole

Design techniques for forming 488-nm holographic lenses with reconstruction at 633 nm

A new design technique is presented for designing holographic lenses based on a K-vector closure principle. The technique enables closed and open loop ray tracing for design optimization and image analysis. A set of APL computer programs has been written for implementation. They are described in detail along with experimental results from holograms constructed at 488 nm and read out at 633 nm.

Two-dimensional focusing holographic grating coupler

Two‐dimensional focusing grating couplers have been produced using holographic interferometry with freely propagating wave fronts. Theoretical considerations lead to an optimized holographic arrangement. Experimental grating couplers with 2.2‐μm focus‐spot diameter have been achieved.

Holographic Laser Beam Deflector

A mechanically rotating laser beam deflector is described that consists of several transmission type volume holograms recorded on a cylindrical surface. Its performance characteristics are compared with those of a multifacetted rotating mirror.

Integrated Optics and Guided Waves-a Report of the Topical Meeting.

A report of the first Topical Meeting on Integrated Optics-Guided Waves, Materials, and Devices has been prepared by four members of the Technical Program Committee. The meeting was held 7-10 February 1972 and was sponsored by the Lasers Technical Group of the Optical Society of America, the International Commission for Optics, and the International Union of Pure and Applied Physics.

Holographic light deflection.

An operational holographic laser light deflector is described, which is well suited for applications requiring fast constant-speed scanning, high resolution, and moderately large angles of deflection. A particularly unique application of this device as an opaque document scanner is also described.

Reactive Optical Information Processing. II: Factors Affecting the Applicability and Efficiency of the Method

The efficiency with which information may be recovered from a phase object is shown to be greater when the object is inserted into a laser cavity than when it is illuminated passively by the same laser. The parameters of both the laser and object which affect this efficiency are discussed. Examples of information processed in coherent, as well as in partially coherent, light are presented.

Integrated Optics: a Report on the 2nd OSA Topical Meeting

This report surveys the papers presented at the 2nd OSA Topical Meeting on Integrated Optics, which was held 21-24 January 1974 in New Orleans, La.

Reactive Optical Information Processing. I: Theory of Information Recovery and Resonator Mode Structure

A method of processing optical information is described in which the use of absorptive spatial filters is replaced by suitable mirrors with spatially varying reflectances. When these mirrors are made the terminal planes of a laser resonator, the light which is lost in conventional spatial filtering systems, is stored in the laser cavity. It is shown that shallowly modulated phase objects may be imaged outside the resonator without any appreciable effect on the modes of the resonator.

Bidirectional Electrically Switched Laser

Operation of a double-rooftop ruby laser emitting along directions that are at an angle of 17.45° with respect to one another has been investigated. The ruby is a 3.17-cm cylinder with a 17.45° chisel at each end, one of which is silver-coated. The other end has an antireflection coating, so that external dielectric (or silver) reflectors complete two separate Fabry–Perot cavities, which have about one-third the active medium in common. A polarizer and nitrobenzene Kerr cell in each path allow fast switching from one axis of emission to the other; the switching has been accomplished within 1 μsec in the present experiment. Some implications of the experiment with regard to more general problems of laser deflection are also discussed.

Photoinduced electrochromic effect and its applications to displays

A liquid solution of an organic donor of the pyrazoline class in a halogenated solvent placed between two transparent electrodes shows blue‐color‐generating electrochromism whose coloring intensity can be controlled by external illumination. The effect seems to be applicable to optically addressable direct‐view passive displays.