Light emitting device and light source imaging system

Abstract

The invention discloses a light emitting device and a light source imaging system. The light emitting device comprises light sources; the light sources comprise light emitting element arrays and composite paraboloid light collectors with light inlets; the light emitting element arrays are arranged at the light inlets of the composite paraboloid light collectors, and thus the composite paraboloid light collectors collect light beams from the light emitting element arrays; and the sum of the light emitting area of all light emitting elements in the light emitting element arrays is greater than or equal to 50% of the area of the light inlets of the composite paraboloid light collectors. According to the light emitting device and the light source imaging system, the light beams with the high brightness can be emerged, and the light out efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of display and illumination, in particular to a light emitting device and a light source imaging system. Background technique [0002] In the LED array in the light source device of the stage light, each LED corresponds to a collimating lens, so that the collimating lens can collimate the emitted light of the LED. However, since the LED has a certain light-emitting area and the light-emitting angle of the LED is relatively large (generally 90 degrees), the collimator lens cannot collect all the outgoing light of the LED, but can only collect the outgoing light within a certain sending angle. [0003] Moreover, the collimation effect of a collimating lens on the outgoing light of the LED is poor, so a collimating lens group is used to work together to collimate the outgoing light of an LED. The collimating lens group generally includes 2 to 3 lens. [0004] However, the design of multiple lenses is difficul...

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Problems solved by technology

However, since the LED has a certain light-emitting area and the light-emitting angle of the LED is relatively large (generally 90 degrees), the collimator lens cannot collect all the outgoing light of the LED, and can only collect the outgoing light within a certain sending angle.

[0003] Moreover, the collimation effect of a collimating lens on the outgoing light of the LED is poor, so a collimating lens group is used to work together to collimate the outgoing light of an LED. The collimating lens group generally includes 2 to 3 lens

[0004] However, the design of multiple lenses is difficult to maintain the etendue of the LED outgoing beam. Generally, after being collimated by the collimating lens group, the etendue of the outgoing beam will increase by three to five times, which is not conducive to obtaining a high-brightness light source.

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