Optical night sky imageer

Details Optical night sky imageer Optical night sky imageer

1993-02-22

1994-10-25

Bell, Paul A.

Printed matter

Miscellaneous

B42D 1500

Patent

active

053582829

ABSTRACT:
An imageer comprises a card printed with a negative image of a veiled woman's face and a set of instructions for use. The negative image has a generally black face with features marked in white and surrounded by a cowl, itself surrounded completely by a circular black area and further includes four white focussing target dots located in mutually spaced apart relation, two on the middle of the nose and two adjacent and below the tip of the nose. In use, a person gazes at the four dots, preferably without blinking, for approximately one minute, then looks away and stares fixedly at a fixed location on a wall or other plain background, preferably the sky at night. A positive afterimage of the negative image will gradually appear to the person.

REFERENCES:
patent: 5098129 (1992-03-01), Haber

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