Abstract: The present invention relates to an optocoupler including a light source having a body and electrical leads, a light detector having a diode stack a metal end cap and electrical leads, and an optical cavity including optically transparent material at least partially covering the body of the light source and the diode stack of the light detector. Also included is a reflective layer including optically reflective material surrounding the optical cavity. The electrical leads of the light source, the metal end cap and the electrical leads of the light detector protrude from the optical cavity and the reflective layer.

Abstract: An alignment reference module (ARM) for detecting an alignment of a hologram with respect to a spindle axis of a spindle that supports an optic device under test (DUT). The hologram is employed for testing an optical surface of the DUT. The ARM includes a flat portion having a reflective surface for reflecting light back toward the hologram member to detect tilting of the hologram relative to the spindle axis. The ARM also includes a spherical portion having a reflective surface adjacent the flat portion for transmitting light back toward the hologram member to detect a radial position of the hologram relative to the spindle axis.

Abstract: The present invention relates to an optocoupler including a light source having a body and electrical leads, a light detector having a diode stack a metal end cap and electrical leads, and an optical cavity including optically transparent material at least partially covering the body of the light source and the diode stack of the light detector. Also included is a reflective layer including optically reflective material surrounding the optical cavity. The electrical leads of the light source, the metal end cap and the electrical leads of the light detector protrude from the optical cavity and the reflective layer.

Abstract: The present invention relates to an optocoupler including a light source having a body and electrical leads, a light detector having a diode stack a metal end cap and electrical leads, and an optical cavity including optically transparent material at least partially covering the body of the light source and the diode stack of the light detector. Also included is a reflective layer including optically reflective material surrounding the optical cavity. The electrical leads of the light source, the metal end cap and the electrical leads of the light detector protrude from the optical cavity and the reflective layer.

Abstract: An objective lens includes multiple optical elements disposed between a first end and a second end, each optical element oriented along an optical axis. Each optical surface of the multiple optical elements provides an angle of incidence to a marginal ray that is above a minimum threshold angle. This threshold angle minimizes pupil ghosts that may enter an interferometer. The objective lens also optimizes wavefront delivery and pupil imaging onto an optical surface under test.

Abstract: An objective lens and a method for using same. The objective lens has a first end, a second end, and a plurality of optical elements. The optical elements are positioned between the first end and the second end and are at least substantially symmetric about a plane centered between the first end and the second end.

Abstract: A system for testing an optical surface includes a rangefinder configured to emit a light beam and a null assembly located between the rangefinder and the optical surface. The null assembly is configured to receive and to reflect the emitted light beam toward the optical surface. The light beam reflected from the null assembly is further reflected back from the optical surface toward the null assembly as a return light beam. The rangefinder is configured to measure a distance to the optical surface using the return light beam.

Abstract: The invention features a bulk light diffuser material. The bulk light diffuser material may be a sheet or film comprising about 95 to about 99.8 percent by weight of polycarbonate and about 0.2 to about 2.5 percent by weight of a particulate light diffusing component, based on the total weight of the polycarbonate and the light diffusing particles. The sheet material has a percent transmittance of at least 70% and a haze of at least 10% measured according to the American Society for Testing and Materials (ASTM) standard D 1003.

Abstract: Apparatus for simultaneously recording and reading information on a medium moveable in forward and reverse directions includes a first record laser and means for establishing a first beam path for recording information on the moveable medium and a second read laser and at least a first and second read-out detector respectively associated with the forward and reversed directions of the recording medium and means for establishing two beam paths which direct the laser light to positions forward and rearward from where the first laser beam illuminates the medium and such read laser beams are reflected respectively to the first and second detectors. The apparatus further includes means to select either the first or the second read-out detectors and to process information read by such selected detector so that as the medium is moving in the forward direction, the data are read from the first detector and when the medium is moving in the reverse direction. the data are read from the second detector.

Abstract: Apparatus for simultaneously recording and reading information on a medium moveable in forward and reverse directions includes a first record laser and means for establishing a first beam path for recording information on the moveable medium and a second read laser and at least one read-out detector and means for establishing a beam path so that the light from the second laser illuminates the medium and is reflected to the detector which reads recorded information.

Abstract: Apparatus for collimating multiple laser beams from a Vertical Cavity Surface Emitting Laser (VCSEL) array and directing the collimated beams through a common aperture includes a VCSEL array including at least two VCSEL sources disposed in a spatial pattern and each VCSEL source emitting a divergent laser beam; a microlens array with lenslet elements disposed in a spatial pattern geometrically similar to the pattern of sources on the VCSEL array, said lenslet pattern being scaled to a smaller dimension than the VCSEL source pattern and arranged to receive the divergent laser beams; and the microlens array being arranged so that the lenslet surface of the microlens array is maintained at a distance from the VCSEL array substantially equal to the focal length of the lenslets to substantially collimate the beams and also being maintained in a lateral orientation so that each beam passes through a corresponding microlens in the microlens array causing the laser beam from each VCSEL source to be directed through a

Abstract: An illuminator for a digital camera includes a body of transparent material defining a cone shaped cavity with an opening at the apex of the cone for a taking lens of the camera and an opening at the base of the cone for locating an object to be photographed with the digital camera. A plurality of light emitting diodes (LEDs) are uniformly distributed throughout the body of transparent material with respect to the surface of the cone. A power supply applies power to the LEDs so that their brightness' are equal.

Abstract: Method and apparatus for reading digital data stored on an optical tape are achieved with a digital optical tape read system including an optical tape and an illumination arrangement. The optical tape has bit cells which are stored along a plurality of tracks of bit cells. Each track includes a line of bit cells, and each bit cell has either a first spot power reflectance representative of a first binary value, or a second spot power reflectance representative of a second binary value. The illumination arrangement functions to illuminate a predetermined area of the optical tape covering a plurality of bit cells with incident light that provides substantially a 180.degree. phase difference between adjacent bit cell locations on the optical tape to be concurrently read.