Electrophotocopier line scanning illuminator

• US 4,427,286 A
• Filed: 07/12/1982
• Issued: 01/24/1984
• Est. Priority Date: 07/12/1982
• Status: Expired due to Fees

• Current Assignee: Pitney Bowes Incorporated (Böwe Systec AG)
• Original Assignee: Pitney Bowes Incorporated (Böwe Systec AG)
• Inventors: Bosse, Thomas W.
• Primary Examiner(s): Prescott, A. C.
• Application Number:
  US06/397,396
• Time in Patent Office: 561 Days
• Field of Search: 355/3 R, 355/14 R, 355/14 E, 355/8, 355/35, 355/47, 355/49, 355/55, 355/56, 355/57, 355/66, 355/70, 355/51, 355/45, 355/60, 362/32, 362/346, 360/6
• US Class Current: 399/221
• CPC Class Codes: G03B 27/542 for copying cameras, reflex exposure lighting

Abstract

A line scanning, illuminating apparatus for use in an electrophotocopying machine. The apparatus includes a linear source of light, a hyperbolic reflector situated behind the linear light source, and a cylindrical lens located in front of the linear light source. The profile of the reflector is given by the equation: ##EQU1## wherein the x and y axes intersect at the center line of the reflector, and wherein B is a positive quantity on the x axis representing the distance between the center line of the reflector and a virtual image of the light source created behind the reflector, and wherein A is a negative quantity representing the distance between the center line of the reflector and the linear light source located in front of the reflector.

Claims

1. A line scanning, illuminating apparatus, for use in an electrophotocopying machine, comprising:

a linear source of light;

a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation;

##EQU4## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and

A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and

a cylindrical lens located in front of said linear light source.

2. An electrophotocopying machine having a line scanning, illuminating apparatus therein, comprising:

a linear source of light;

a hyperbolic reflector situated behind the linear light source, the profile of the reflector being given by the equation;

##EQU5## B=a point on the x axis and represents the distance between the center line of said reflector and a virtual image of the light source created behind said reflector, and is a positive quantity, and

A=a negative quantity representing the distance between the center line of said reflector and the linear light source located in front of said reflector; and

a cylindrical lens located in front of said linear light source.

3. The electrophotocopying machine of claim 2, further comprising a reciprocating carriage.