Optically integrating oculometer

• US 4,003,642 A
• Filed: 04/22/1975
• Issued: 01/18/1977
• Est. Priority Date: 04/22/1975
• Status: Expired due to Term

• Current Assignee: Biosystems Research Incorporated
• Original Assignee: Biosystems Research Incorporated
• Inventors: Vogeley, Arthur W.
• Primary Examiner(s): Sacher, Paul A.
• Application Number:
  US05/570,853
• Time in Patent Office: 637 Days
• Field of Search: 351/6, 351/7, 351/39, 250/206, 250/221, 250/578, 340/279, 350/190, 350/199, 350/201
• US Class Current: 351/210
• CPC Class Codes: A61B 3/113 for determining or recording eye movement

Abstract

An improved oculometer yielding simplified data accumulation and reduction techniques because of the use of a cylindrical lens system which optically integrates the light reflected from the eye being studied. The use of the cylindrical lens system and a linear sensing element reduces the location data required by a factor of a square root and makes digital processing of the information practical.

Claims

1. An improved oculometer which comprises:

radiation source means;

directing means for focusing and directing the emissions from said radiation source onto an observers eye;

optical integration means which processes the reflections from the observers eye by compressing the optical field in at least one dimension so that the optical field of the reflections is converted into a linear form with varying light information along its length; and

linear sensing array means comprising a series of individual sensing elements upon which the linear form of the reflections are focused which yield electrical information varying with the intensity of radiation falling on the individual elements of the array.

2. An improved oculometer as in claim 1 wherein said optical integration means is at least one cylindrical lens system comprising a cylindrical lens and a compensating lens.

3. An improved oculometer as in claim 1 wherein said radiation source means is at least one light emitting diode.

4. An improved oculometer as in claim 1 wherein said optical integration means includes a beam splitter to form two resulting beams from the reflections from the observers eye;

and two cylindrical lens systems, one cylindrical lens system to optically integrate each of said resulting beams, and wherein said linear sensing array means includes two linear sensing arrays one for each of said resulting beams.

5. An improved oculometer as in claim 4 wherein the resulting beams are optically integrated to produce lines which represent perpendicular dimensions of the original optical field.