Electrophotocopier line scanning illuminator
AssigneePitney Bowes Inc.
InventorThomas W. Bosse
Life of this patent
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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.
Claims3
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.
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.
Dependencies are inferred from the claim text.