Constant light source device of high-brightness projector

Abstract

The invention relates to a constant light source device of a high-brightness projector, which is used for a light filming monitoring system. The constant light source device is mainly characterized in that a lamp holder with an optical channel arranged on the center is fixedly arranged in the front wall of a light source launching box body, a light source lamp with a spotlight lamp shade is arranged on the lamp holder, wherein the spotlight surface of the spotlight lamp shade faces towards the optical channel and is buckled and connected with the lamp holder, the light source lamp is respectively connected with an arranged power supply constant control module and a light source lamp working timer through wires, a light source ejecting hole is arranged in the front wall of the box body, an air inlet and a heat radiating air outlet are correspondingly arranged in the side wall of the box body, and a fan is arranged on the air inlet. The constant light source device of the high-brightness projector is capable of producing a constant high-energy intense light source; and the brightness of condensed light emitted by the light source is high and stable. Meanwhile, the using time of the light source lamp can be automatically controlled. The constant light source device has the advantages of reasonable structure design, high light energy usage, reliable work and the like.

Description

technical field [0001] The invention belongs to the field of optical technology, in particular to a constant light source device for a high-brightness light projector used in an optical coating monitoring system. Background technique [0002] In the optical vacuum coating monitoring process, the light source is the basis for generating the film thickness signal. It modulates and splits the light emitted by the light source part of the light projector, projects it onto the comparison sheet, and then generates the film thickness optical signal through the reflection of the comparison sheet. In this process, the light source is required to emit light that can provide high brightness and stable light source. In the prior art, the light source part of the light projector usually adopts an incandescent bulb placed flatly or vertically in the light source box, and some of them place a plane or curved reflector behind the incandescent bulb to enhance the brightness of the emitted li...

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Problems solved by technology

[0003] 1. For vertical incandescent lamps without reflectors, the light emitted by the light source in the direction of the exit hole is scattered light or parallel light generated by reflection. Since the light beam transmitted through the exit hole is very small, most of the light is projected It is wasted on the wall of the light source box, so the utilization rate of light energy is low, and the emitted light is too weak, which leads to weak light signal of the monitoring system, difficult monitoring and identification, and poor effect

[0004] 2. The light source lamp is directly connected to the power supply. The fluctuation of the power supply voltage causes the brightness of the light source to be unstable, which affects the accuracy of optical signal monitoring, resulting in poor film thickness monitoring effect

[0005] 3. There is no heat dissipation measure in the light source box. The continuous operation of the bulb for a long time will cause the temperature of the light source box to be too high, which will increase the impedance of the power supply and affect the luminous effect of the bulb.

[0006] 4. The luminous performance of the bulb decreases at the end of its service life, which will directly affect the signal quality of the monitoring system, so it must be replaced in time, but relying on manual operation and memory, it is impossible to accurately control the replacement time in time, and its reliability is poor

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