Browse Prior Art Database

Split Optics Alignment for Microphotography

IP.com Disclosure Number: IPCOM000089923D
Original Publication Date: 1968-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Lasky, DJ: AUTHOR

Abstract

Alignment apparatus 1 is used to position a large movable workpiece 2 in parallel alignment with an edge of fixed reference stage 3. When properly positioned, an image drawn on the face of the workpiece can be measured or is reduced by microphotography and used in further stages of construction of printed circuitry. The workpiece is held in frame F, shown in part, which is adjustable in a vertical position at either side of workpiece 2.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 99% of the total text.

Page 1 of 2

Split Optics Alignment for Microphotography

Alignment apparatus 1 is used to position a large movable workpiece 2 in parallel alignment with an edge of fixed reference stage 3. When properly positioned, an image drawn on the face of the workpiece can be measured or is reduced by microphotography and used in further stages of construction of printed circuitry. The workpiece is held in frame F, shown in part, which is adjustable in a vertical position at either side of workpiece 2.

Reference marks located near the side edges 4 and 5 of workpiece 2 are carried as coherent images through flexible segments 6 and 7 of an oriented fiber optics bundle 8 and enlarging optics 9 to view screen 10. The composite image of the reference marks appears as marks 11 and 12 on screen 10. When the vertical positioning of the sides of frame F is completed, these marks appear aligned.

The ends of fiber segments 6 and 7 are fixed in slidable holding members 13 and 14 arranged to slide on projection 15 of stage 3. Thus, workpieces 2 of different widths can be accommodated by the alignment apparatus. Alternately, height variations can be accommodated by the addition of micrometer barrels in 13 and 14 to establish a new reference on the same plane as stage 3. Workpiece 2 is illuminated from the rear by fluorescent lamp 16. Alternatively, the combination of a lamp below stage 3 and a mirror can be used to backlight the workpiece.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-...