In daily laser applications, the light emitted by the light source is generally uneven, if this light is not processed and used directly, then the imaging of the light source will appear to be of varying brightness, compound eye lens is formed by a series of small unit lens combinations. The double-row compound eye lens array is applied to the lighting system, which can obtain high light energy utilization and uniform illumination over a large area. The key to achieving uniform illumination by using double-row compound eye lens arrays is to improve their uniformity and illumination brightness.
Compound eye lenses can be widely used in displays, projection, 3D printing, lithography lighting, cameras, cell phones, projectors, security monitoring and other consumer electronics and astronomy, biology, medicine and aerospace.
Q: How does a compound eye lens equalize light? What are its advantages?
A: compound eye lens array to achieve uniform illumination is the principle: and the optical axis parallel to the light beam through the first lens after focusing on the center of the second lens, the first row of compound eye lenses cross the light source to form a number of light source image for illumination, the second row of compound eye lenses of each small lens will be the first row of compound eye lenses corresponding to the small lens overlapping the image of the illumination surface. As the first row of compound eye lenses the entire wide beam of the light source is divided into a plurality of fine beams for illumination, and the vertical axis inhomogeneity within the range of each fine beam, in the symmetrical position of the fine beams are superimposed on each other, so that the vertical axis inhomogeneity of the fine beams is compensated for, so as to make the entire aperture within the light energy to be utilized in an effective and uniform manner. The light spot emitted from the second row of compound eye lenses is focused on the illumination screen through a concentrating mirror. In this way, each point of the light spot on the illumination screen is irradiated by light emitted from all points of the light source. At the same time, the light beams from each point on the light source overlap into the same field of view on the illuminated spot, and a homogeneous spot is obtained.
Light source uniform light sketch
There are two types of compound eyes commonly found on the market: quartz glass compound eyes and plastic compound eyes. Quartz glass compound eye because of its high temperature resistance, corrosion resistance, good thermal stability, good light transmission performance and other characteristics, compared with the plastic compound eye is more advantageous, often used in exposure machines, microdisplays and higher-end home appliances and other fields. According to market research, the use of quartz glass compound eyes in the market is 20% growth trend every year.
Q: How to distinguish the quality of compound eyes? What equipment is available to do so?
A: In addition to traditional testing methods, high-tech and accurate testing methods are also available. We have added a spot tester and a transmittance tester. The spot tester can be judged by the size and shape of the hit spot and its sharpness. Generally speaking, a normal spot is sharper on all sides and has a better light gathering effect, while an abnormal spot is more rounded on all sides and spreads out in all directions with a very poor light gathering effect. The transmittance tester can identify whether the material can reach our desired transmittance and the stability of the coated band through the graph shown in the transmittance test.
Future directions
With the rapid development of optical technology, many optical technologies have been able to obtain a wide range of applications. Quartz glass compound eye lens as a rising star in optical lenses, after more than 10 years of development, has been recognized by the market, in the application of laser, showing a growing trend every year. It is believed that it will get better and better in the future development!
