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Macro Micrometric Contact Printing Evaluation Target

IP.com Disclosure Number: IPCOM000092583D
Original Publication Date: 1966-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Huffman, HD: AUTHOR [+2]

Abstract

In contact printing successive generations of films, lack of proper contact results in reduced image quality.

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Macro Micrometric Contact Printing Evaluation Target

In contact printing successive generations of films, lack of proper contact results in reduced image quality.

A test film for evaluating contact is shown. The film is provided with approximately 60 lines/mm which act as a diffraction grating when held at the proper angle in white light. A number of resolution patterns are interspersed at intervals throughout the film area.

If the test film is in good contact with the copy film, the grating and resolution patterns are reproduced on the copy. When the copy film is held at the proper angle in white light, the grating diffracts a spectrum in the same manner as the test film. The resolution patterns provide a numerical measure of the contact. In areas of noncontact, a spectrum is not produced. Those areas instead appear as lines or irregular areas. The resolution patterns deteriorate proportionately to the lack of spectrum producing areas surrounding each resolution pattern.

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