CN209909672U

CN209909672U - Optical system of stage LED light source with field lens

Info

Publication number: CN209909672U
Application number: CN201920530360.0U
Authority: CN
Inventors: 黄成�; 李秀斌; 陈国平
Original assignee: Guangzhou Guang Lian Electronic Technology Co Ltd
Current assignee: Guangzhou Guang Lian Electronic Technology Co Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-01-07
Anticipated expiration: 2029-04-18

Abstract

The utility model relates to an optical system of stage LED light source with field lens, which comprises an LED light source module, a condenser lens and a CMY optical filter, wherein the LED light source module, the condenser lens and the CMY optical filter are arranged in sequence, the condenser lens is used for focusing light rays emitted from the LED light source module to a focal plane, and the CMY optical filter is used for filtering light rays emitted from the condenser lens; a field lens is arranged between the focal plane of the light focus and the CMY optical filters and is used for reducing the incident angle of the light rays emitted from the condenser and entering the CMY optical filters and increasing the area of the area where the emitted light rays enter the CMY optical filters; the focal plane is the plane where the combined focus of the condensing lens and the field lens is located. The field lens shares the refraction angle of the original condenser, so that the density of light rays emitted from the condenser and irradiated on the CMY optical filters is reduced, meanwhile, the light rays reflected back by the CMY optical filters are not concentrated and reflected to the area of the central area of the optical axis, the product defect caused by the fact that the light rays are reflected back by the CMY optical filters is overcome, and the service lives of optical components and LEDs near the central area of the optical axis of the light source are guaranteed.

Description

Optical system of stage LED light source with field lens

Technical Field

The utility model relates to a stage lamp technical field, more specifically relates to an optical system of stage LED light source of taking scene.

Background

In the stage lighting industry, a high-power discharge bubble lamp (commonly called HID lamp) is traditionally used as a light source of the stage lamp, and the light source has the advantages of high power and small illuminant (namely, bulb arc), but has the defects of high energy consumption, short service life, low safety factor (high-pressure gas is filled in the bulb), harsh requirements on working conditions and the like. With the development of scientific technology, semiconductor lighting technology is mature more and more, and the light emitting density of the LED is also improved, so that the LED is applied more and more widely in various fields. If the high-power LED light source applied to the field of stage lamps can be widely popularized and used, the rapid development of the whole industry and the upgrading of an energy structure are promoted, and the modern lighting technology is safer, more energy-saving and more environment-friendly.

The principle of the existing high-power LED light source system applied to the field of stage lamps is shown in figure 1, a plurality of LED light-emitting devices which emit white light are arranged into an LED array (1) according to a certain rule, and each LED unit is arranged in one-to-one correspondence with a collimating lens group; the collimating lens array (2) is formed by the collimating lens groups and is used for collimating the light rays emitted by the LED array (1) into near-parallel light to be emitted; the light emitted by the LED through the collimating lens array (2) enters the condenser (3), the condenser (3) focuses the light on a specific focal plane (6) to form a specific illumination area, and the included angle (full angle) of the light emitted by the light source system is 52-60 degrees. On the application side, in order to realize the color variability of the lamp, a CMY filter (4) is usually added between a focal plane (6) of a light source system and a condenser lens (3) to change the color of the lamp, so as to realize the color diversification effect of the lamp.

When the CMY optical filter (4) is arranged between the condenser lens (3) and the focal plane (6), because the CMY optical filter (4) not only can transmit a part of light to the focal plane (6), but also can reflect a part of light, the reflected light can reach the condenser lens (3) of the light source system, the reflected light is focused on the central area of the optical axis of the PCB board provided with the LED array (1) again through the condenser lens (3), the temperature of the area is increased, and serious damage is caused to optical components and the LED array (1) near the central area of the optical axis of the whole light source, such as bad phenomena of cracking of the optical components, and the like, particularly high junction temperature of the LED near the central area of the optical axis, and the service life of the LED is reduced.

Disclosure of Invention

The utility model aims at overcoming above-mentioned prior art's defect, provide an optical system of stage LED light source of tape scene, can solve the product defect that the light that is reflected back by the CMY light filter leads to for optical components and parts and LED's near light source optical axis central zone thermal behavior is more stable, and then the guarantee life-span.

In order to achieve the purpose, the utility model adopts the technical proposal that: the optical system comprises an LED light source module, a condenser and CMY optical filters, wherein the LED light source module, the condenser and the CMY optical filters are sequentially arranged, the condenser is used for focusing light rays emitted from the LED light source module to a focal plane, and the CMY optical filters are used for filtering light rays emitted from the condenser; a field lens is arranged between the focal plane of the light focus and the CMY optical filters and is used for reducing the incident angle of the light rays emitted from the condenser and entering the CMY optical filters and increasing the area of the area where the emitted light rays enter the CMY optical filters; the focal plane is the plane where the combined focus of the condensing lens and the field lens is located.

In the above-mentioned scheme, share the refraction angle of original condensing lens through the field lens, make the angle of condensing lens refraction diminish, the incident angle that light got into CMY optical filter light after the condensing lens can diminish like this, and the regional area increase that light shines on CMY optical filter, make the light density on CMY optical filter step-down like this, the light that is reflected back simultaneously also is unlikely to light and is concentrated reflection to the regional area of optical axis center because of incident angle diminishes, the light of reflection is by evenly distributed on the bigger irradiation area, and then reduce the light energy concentration that light source optical axis center regional reflection was back near, thereby reduce the temperature, make optical components and parts and LED's near optical axis center regional thermal behavior more stable, the life-span is more secure.

Preferably, the LED light source module includes an LED array and a collimating lens array, which are sequentially arranged; the LED array comprises a plurality of LED units, the collimating lens array comprises a plurality of collimating lens groups, each LED unit and each collimating lens group are arranged in a one-to-one correspondence mode, the collimating lens array is used for collimating light rays emitted by the LED array, and the collecting lens is used for focusing the light rays emitted from the collimating lens array to a focal plane.

Further preferably, the collimating lens array is formed by seamlessly splicing two lens arrays.

Preferably, the distance between the field lens and the condenser lens in the direction of the optical axis is 30-40 mm.

Further preferably, the distance between the CMY filters and the condenser lens in the optical axis direction is 5 to 35 mm.

Preferably, the focal length of the field lens is less than the focal length of the collection lens.

Preferably, the incident angle of the light rays exiting from the condenser lens into the CMY filter is less than 10 °.

Preferably, the included angle of the light rays generating the light beam after exiting from the field lens is 50-60 degrees.

Preferably, the field lens is a plano-convex lens or a biconvex lens.

Compared with the prior art, the beneficial effects of the utility model are that: sharing the refraction angle of original condensing lens through the field lens, make the angle of condensing lens refraction diminish, the incident angle that light got into CMY optical filter light after the condensing lens can diminish like this, and the regional area increase that light shines on CMY optical filter, make the light density on CMY optical filter step-down like this, the light that is reflected back simultaneously also becomes unlikely to light because of incident angle diminishes and is concentrated reflection to the regional area of optical axis center, the light of reflection is by evenly distributed on bigger irradiation area, and then reduce the light energy concentration that light source optical axis center area near reflects back, thereby reduce the temperature, make optical components and parts near the regional thermal behavior of optical axis center and LED more stable, the life-span is more secure.

Drawings

Fig. 1 is an optical schematic diagram of a prior art LED light source system, wherein the dotted line represents the light reflected back to the central region of the optical axis.

Fig. 2 is a schematic diagram of an optical system of a stage LED light source with field lens according to the present embodiment, wherein a dotted line represents a light ray reflected back to a central region of an optical axis.

The attached drawings are as follows: 1 an LED array; 2 a collimating lens array; 3, a condenser lens; 4CMY filters; 5, a field lens; 6 focal plane.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Examples

As shown in fig. 2, the present embodiment provides an optical system of a stage LED light source with field lens, which includes an LED light source module, a condenser 3 and a CMY filter 4, which are sequentially disposed, where the condenser 3 is used for focusing light emitted from the LED light source module to a focal plane 6, and the CMY filter 4 is used for filtering light emitted from the condenser 3; a field lens 5 is arranged between a focal plane 6 for focusing light rays and the CMY optical filters 4, and the field lens 5 is used for reducing the incident angle of the light rays emitted from the condenser lens 3 entering the CMY optical filters 4 and increasing the area of the area where the emitted light rays enter the CMY optical filters 4; the focal plane 6 is the surface where the combined focus of the condenser lens 3 and the field lens 5 is located.

Sharing the refraction angle of original condensing lens 3 through field lens 5, make the angle of condensing lens 3 refraction diminish, the incident angle that light got into 4 light of CMY light filter can diminish after the condensing lens 3 like this, and the regional area increase that light shines on CMY light filter 4, make the light density on CMY light filter 4 step down like this, the light that is reflected back simultaneously also becomes unlikely to light because of incident angle diminishes and is concentrated reflection to the regional area of optical axis center, the light of reflection is by evenly distributed on the bigger irradiation area, and then reduce the light energy density that light source optical axis center regional reflection was back near, thereby reduce the temperature, make optical components and parts and LED's near the optical axis center regional thermal behavior more stable, the life-span is more secure.

In this embodiment, the LED light source module includes an LED array 1 and a collimating lens array 2, which are sequentially disposed; the LED array 1 comprises a plurality of LED units, the collimating lens array 2 comprises a plurality of collimating lens groups, each LED unit and each collimating lens group are arranged in a one-to-one correspondence mode, the collimating lens array 2 is used for collimating light rays emitted by the LED array 1, and the condenser lens 3 is used for focusing the light rays emitted from the collimating lens array 2 to the focal plane 6.

The collimating lens array 2 is a collimating lens array formed by seamlessly splicing two lens arrays.

In addition, the distance between the field lens 5 and the condenser lens 3 in the optical axis direction is 30 to 40 mm.

Wherein the distance between the CMY filter 4 and the condenser lens 3 in the optical axis direction is 5 to 35 mm.

In addition, the focal length of the field lens 5 is smaller than the focal length of the condenser lens 3.

Wherein the incident angle of the light rays exiting from the condenser lens 3 and entering the CMY filter 4 is less than 10 °.

In addition, the included angle of the light beams generated after the light beams are emitted by the field lens 5 is 50-60 degrees.

Wherein, the field lens 5 is a plano-convex lens or a biconvex lens.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The optical system of the stage LED light source with the field lens is characterized by comprising an LED light source module, a condenser lens (3) and CMY optical filters (4) which are sequentially arranged, wherein the condenser lens (3) is used for focusing light rays emitted from the LED light source module to a focal plane (6), and the CMY optical filters (4) are used for filtering the light rays emitted from the condenser lens (3); a field lens (5) is arranged between a focal plane (6) for focusing light rays and the CMY optical filters (4), and the field lens (5) is used for reducing the incident angle of the light rays emitted from the condenser lens (3) and entering the CMY optical filters (4) and increasing the area of the region where the emitted light rays enter the CMY optical filters (4); the focal plane (6) is the plane where the focal point of the lens system of the combination of the condenser lens (3) and the field lens (5) is located.

2. The optical system of a stage LED light source with field lens as claimed in claim 1, wherein the LED light source module comprises an LED array (1) and a collimating lens array (2) arranged in sequence; the LED array (1) comprises a plurality of LED units, the collimating lens array (2) comprises a plurality of collimating lens groups, each LED unit and each collimating lens group are arranged in a one-to-one correspondence mode, the collimating lens array (2) is used for collimating light rays emitted by the LED array (1), and the condenser lens (3) is used for focusing the light rays emitted from the collimating lens array (2) to the focal plane (6).

3. An optical system of a stage LED light source with field lens as claimed in claim 2, wherein the collimating lens array (2) is a collimating lens array formed by seamlessly splicing two lens arrays.

4. An optical system of a stage LED light source with a field lens according to claim 1, characterized in that the distance between the field lens (5) and the condenser lens (3) in the direction of the optical axis is 30-40 mm.

5. Optical system of a stage LED light source with field lens according to claim 4, characterized in that the distance between the CMY filters (4) and the condenser (3) in the direction of the optical axis is 5-35 mm.

6. Optical system of stage LED light source with field lens according to any of claims 1 to 5, characterized in that the focal length of the field lens (5) is smaller than the focal length of the condenser lens (3).

7. Optical system of a stage LED light source with field lens according to claim 1, characterized in that the incidence angle of the rays exiting from the condenser (3) entering the CMY filters (4) is less than 10 °.

8. An optical system of a stage LED light source with a field lens as claimed in claim 1, characterized in that the included angle of the light beam generated by the field lens (5) after emergence is 50 ° -60 °.

9. Optical system of stage LED light source with field lens according to any of claims 1 to 5 and 7 to 8, characterized in that the field lens (5) is a plano-convex lens or a biconvex lens.