Composite lens for secondary light distribution of stage lamp

A technology of secondary light distribution and light distribution lens, which is applied in the field of lighting technology, can solve the problems of large divergence angle of light source and low light energy utilization rate, etc., and achieve the effect of increasing illuminance and improving light energy utilization rate

Inactive Publication Date: 2014-09-10
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a secondary light distribution lens capable of improving the light-gathering ability of the stage light in view of the large divergence angle of the LED light source and the low utilization rate of light energy in the prior art

Method used

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  • Composite lens for secondary light distribution of stage lamp
  • Composite lens for secondary light distribution of stage lamp
  • Composite lens for secondary light distribution of stage lamp

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Embodiment Construction

[0015] 1. If figure 2 As shown, an LED light source for lighting, its diameter is 32.8mm, and the divergence angle of the light source is 60°. Along the optical axis, the distance between the Fresnel lens 3 and the LED light source 1 is 140mm1 2 <10mm.

[0016] 2. The surface of the secondary light distribution lens is coated with a 400-800nm ​​broadband anti-reflection film, and the difference in color temperature between the light spot formed by the use of the light distribution lens and the unused light distribution lens of the stage light is small.

[0017] 3. When the light is emitted from the LED light source 1, the original propagation direction is changed through the light distribution lens 2, and the light converged in the range corresponding to the Fresnel lens increases, and the light energy in the center of the Fresnel lens is larger than that at the edge of the Fresnel lens. This not only effectively improves the utilization rate of light energy, but also increa...

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Abstract

The invention belongs to illumination equipment, and relates to a secondary light distribution lens for a stage illumination lamp, wherein the stage illumination lamp mainly comprises a light source, a focusing lens and a light distribution lens. A light source is a high-power LED array light source with an aperture of 32.8mm; the focusing lens uses a large-tooth-groove glass Fresnel lens; a lens with a secondary light distribution function is formed by gluing a large-aperture parallel flat plate and a small-aperture plano-convex lens, located between the light source and the Fresnel lens, and used for changing the propagation direction of a light ray and playing a secondary light distribution role; the centre illumination intensity of a light spot can be increased by about 10% in case of no increase for the radius of the light spot by using the secondary light distribution lens. The light distribution lens is plated with a broadband antireflection film with a wavelength of 400-800nm, thus guaranteeing no significant changes of the colour temperature of the illumination lamp after using the secondary light distribution lens.

Description

technical field [0001] The invention relates to a lighting technology. More specifically, it is a light distribution technology for stage lights. Background technique [0002] With the continuous improvement of the lighting design level, the lighting level of the stage lighting is also improved. However, the existing spotlight for stage lighting uses a Fresnel lens to distribute light to the light source. Due to the large light angle of the LED light source, Its effective light energy utilization rate is low. When a large-diameter LED array light source is used, the light spot generated is relatively large. Using an ordinary plano-convex lens for secondary light distribution, the light spot will continue to increase. In practical applications, the light spot is too large to meet the requirements. Therefore, a secondary light distribution lens that can increase the illuminance at the center of the spot without changing the size of the spot is required. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/04F21W131/105F21W131/406F21Y101/02F21Y115/10
Inventor 罗春华张东旭张齐元
Owner CHANGCHUN UNIV OF SCI & TECH
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