Browse Prior Art Database

High Contrast Microscope Reticle

IP.com Disclosure Number: IPCOM000043850D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05

Publishing Venue

IBM

Related People

Authors:
Eckert, B Frank, RA Fryman, J Kuhlman, JE [+details]

Abstract

The new reticle pattern described herein compensates for viewing losses inherent in TV systems. The arrangement further provides a more precise method of positioning. When viewing the part to be inspected through the gage microscope, a cross-hair reticle with .0001" wide lines can be viewed very nicely. However, when viewing the same field with a closed-circuit television system, the .0001 wide cross-hair cannot be resolved on the viewing monitor due to the inherent losses from the monitor screen dot pattern. The present arrangement solves this problem by using a staggered block pattern 10 instead of a cross-hair in the gage microscope. The technique is to provide a large-black rectangular (.005" x .010") pattern 10. The size of these blocks 12 is large enough so they can be easily viewed on the television monitor.