Light-emitting element array with micro-lenses and optical writing head
AssigneeFuji Xerox Co., Ltd.
InventorsKenjiro Hamanaka, Takahiro Hashimoto
Life of this patent
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Abstract
A light-emitting element array with the improvement of the light-emitting efficiency and the improvement of the uneven amount of light is provided. A light-emitting element array comprises a light-emitting portion array consisting of a plurality of light-emitting portions linearly arranged in a main scanning direction, and a micro-lens formed on each of the light-emitting portions, wherein the micro-lens has a shape of the length of a sub-scanning direction different from the length of the main scanning direction, and the length of the sub-scanning direction is longer than the length of the main scanning direction, and is 3.5 times or less of the length of the main scanning direction.
Claims10
1-23. (canceled)
A light-emitting element array, which has a structure in which a plurality of light-emitting element array chips are arranged in staggered manner, comprising the plurality of light emitting element array chip each including:
- a light-emitting portion array consisting of a plurality of light-emitting portions linearly arranged in a main scanning direction;
- and
- a micro-lens formed on each of the light-emitting portions,
- wherein the light-emitting element array includes a plurality of light-emitting element array chips, and
- each light-emitting element array chip includes on the surface of each chip a bonding pad, which feeds the power of the light-emitting portions through a wire, and a resin pattern, and
- the resin pattern comprises the micro-lenses, and resin surface located in the surrounding of the micro-lenses, and a stray-light prevention wall for preventing a light being entered from a light-emitting portion on one chip to the wire of the bonding pad on the other pad on the other chip.
Dependencies are inferred from the claim text.