Accession Number:

ADA229192

Title:

Holographic Optical Head

Descriptive Note:

Final rept.

Corporate Author:

HOLOMETRIX INC CAMBRIDGE MA

Report Date:

1990-09-01

Pagination or Media Count:

35.0

Abstract:

An experimental optical head using Holographic Optical Elements HOEs has been set up in our laboratory. The observed reconstructed spot size is less than 2 micron in diameter. Wavelength tolerance is or - 5nm centered at 832 nm. A new design using two aspherical lenses and two HOEs would operate over or - 15 nm. The new design can be the basis of a practical, highly compact, and reliable optical head. Performance can be significantly enhanced by using an e-beam pattern generator to fabricate an intermediate computer generated hologram needed to process the working HOEs. This will simplify the fabrication procedure and greatly reduce fabrication errors. Significant progress has also been made in developing a technique to make high-efficiency volume IR holograms, whose diffraction efficiency may approach 100. This technique is unique and has not been reported in the literature by other researchers. Continuing effort is recommended to use an e-beam pattern generator to fabricate the intermediate HOEs, to design and fabricate high efficiency. KR

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Holography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE