Compact unit for optical security system

• US 3,997,723 A
• Filed: 08/19/1974
• Issued: 12/14/1976
• Est. Priority Date: 08/19/1974
• Status: Expired due to Term

• Current Assignee: Visual Methods Incorporated
• Original Assignee: Visual Methods Incorporated
• Inventors: Sandin, Walter T.
• Primary Examiner(s): Safourek, Benedict V.
• Assistant Examiner(s): Coles, Edward L.
• Application Number:
  US05/498,405
• Time in Patent Office: 848 Days
• Field of Search: 178/7.91, 178/7.92, 178/7.8, 178/DIG. 1, 178/DIG. 38, 235/61.7 B, 340/149 A
• US Class Current: 348/343
• CPC Class Codes: G08B 13/19626 optical details, e.g. lenses, mirrors or multiple lenses
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

A thin wall-mountable unit is disclosed which produces a composite image from a card-like object placed in a slot and a person standing adjacent thereto. The unit includes a pair of lenses for focusing images of the objects on intersecting focal planes. A mirror is mounted in the unit at the intersection of the focal planes. A T.V. camera is employed to sense the composite image resulting therefrom.

Claims

1. A composite image producing system including:

a housing;

a first lens, mounted in said housing and having an optical axis, for forming the image of a first object in a first focal plane;

said first object being located at a first predetermined position to a first side of said optical axis;

a second lens, mounted in said housing, for forming the image of a second object in a second focal plane which includes said optical axis;

said second object being located at a second predetermined position;

said second focal plane intersecting said first focal plane at a line of intersection; and

a first mirror;

said first mirror having an edge;

said first mirror being mounted in said housing with said edge at said line of intersection and to a second side of said optical axis.

2. The composite image producing system as defined in claim 1 also including:

means, mounted on said housing, for defining said first predetermined position in front of said housing.

3. The composite image producing system as defined in claim 2 in which said means for defining said first predetermined position is a second mirror.

4. The composite image providing system as defined in claim 3 in which said second predetermined position is located within said housing.

5. The composite image providing system as defined in claim 4 also including:

a third mirror for reflecting light from said second predetermined position onto said second lens.

6. The composite image providing system as defined in claim 5 also including:

means, mounted at said second predetermined position, for indicating time.

7. The composite image producing system as defined in claim 1 also including:

means, mounted in said housing, for sensing said composite image.

8. The composite image producing system as defined in claim 7 in which said sensing means is a T.V. camera.

9. The composite image producing system as defined in claim 8 also including:

means, mounted on said housing, for defining said first predetermined position in front of said housing.

10. The composite image producing system as defined in claim 9 in which said means for defining said first predetermined position is a second mirror.

11. The composite image providing system as defined in claim 10 in which said second predetermined position is located within said housing.

12. The composite image providing system as defined in claim 11 also including:

a third mirror for reflecting light from said second predetermined position onto said second lens.

13. The composite image providing system as defined in claim 12 also including:

means, mounted at said second predetermined position, for indicating time.