Hologram Scanner Design And Fabrication In Dichromated Gelatin (DCG)

Richard Rallison; Rick Lowe

doi:10.1117/12.933949

7 July 1983 Hologram Scanner Design And Fabrication In Dichromated Gelatin (DCG)

Richard Rallison, Rick Lowe

Proceedings Volume 0353, Industrial and Commercial Applications of Holography; (1983) https://doi.org/10.1117/12.933949
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

Abstract

Two major applications of holographic scanners are considered, the first is the code reader scanner now in use in supermarkets and soon to be used in automated warehousing. The second is the multipurpose line scanner currently used in line printers and soon to be included in automated inspection systems. Code reader facets perform multiple functions, each one deflects and focuses laser light at a unique angle and scans a short arc, the return light from a bar code is collimated by the same facet and is subsequently focused through a small aperture. Ambient light is diffracted at other angles and focused at points all around the aperture giving a high signal to noise ratio and the large high efficiency facets gather sufficient return light so that photo diodes and low power lasers can be used in the system. Line scanners can be made in a large variety of sizes and configurations inexpensively and with perfect fidelity, each one being a holographic replica of a master hologram. Focused arcs as well as parallel straight lines and even arbitrary computer generated scans are possible. The limitations and considerations of such devices are discussed along with design criteria related to fabrication problems and actual production line results.

Citation Download Citation

Richard Rallison and Rick Lowe "Hologram Scanner Design And Fabrication In Dichromated Gelatin (DCG)", Proc. SPIE 0353, Industrial and Commercial Applications of Holography, (7 July 1983); https://doi.org/10.1117/12.933949

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available