Optical print head, method for enhancing light quantity thereof and optical printer
OwnerYung-Shan Lininventor
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Abstract
An optical print head and a method for enhancing light quantity thereof and optical printer are provided. A convergent micro-lens set is disposed between the LED lighting plate and the self-focusing micro-lens array, and is used to converge the emitting light generated by the LED lighting plate into the self-focusing micro-lens array. As such, the optical coupling efficiency of the optical print head is increased by increasing the light quantity of entering into the self-focusing micro-lens array.
Claims21
An optical print head, comprising:
- a light-emitting diode (LED) lighting plate including a plurality of light-emitting diodes for generating an emitting light;
- and
- a convergent micro-lens set and a self-focusing micro-lens array, wherein the convergent micro-lens set is disposed in the optical path of the emitting light between the LED lighting plate and the self-focusing micro-lens array to converge the emitting light generated from the LED lighting plate, the self-focusing micro-lens array is used to receive the emitting light transmitted from the convergent micro-lens set, and image the emitting light uniformly on a predetermined imaging point.
A method of utilizing the optical print head, wherein a convergent micro-lens set is disposed between a LED lighting plate and a self-focusing micro-lens array, the method comprising the following steps:
- generating an emitting light by driving the LED lighting plate with a driving current;
- converging the emitting light through the convergent micro-lens set and exposing it into the self-focusing micro-lens array;
- and
- imaging the emitting light uniformly onto a predetermined imaging point after it passing through the self-focusing micro-lens array.
Dependencies are inferred from the claim text.