To understand the advantages of quartz glass compound eye lens in laser application

In daily laser application, the light emitted by the light source will generally have an uneven phenomenon. If these light is used directly without processing, the maging of the light source will appear with different brightness. The flyeye lens is formed by a series of small unit lenses. By the application of the double-row flyeye  lens array to the illumination system, high light energy utilization and large areas of uniform illumination can be obtained. The key to achieving uniform illumination is to improve its uniformity and illumination brightness.

Flyeye  lenses can be widely used in display, projection, 3D printing, lithography lighting, cameras, mobile phones, projectors, security monitoring and other consumer electronics and astronomy, biology, medicine and aerospace fields.

Q: How does the  flyeye lens lens achieve uniform light? What advantages does it have?

Answer: the  flyeye lens lens array achieve uniform lighting principle is: parallel to the optical axis through the first lens after focusing in the center of the second lens, the first row of  flyeye lens lens crosslight source form multiple light like for illumination, the second row of  flyeye lens lens each small lens will be the first row of  flyeye lens lens corresponding small lens overlap imaging on the illumination surface. Because the first row of  flyeye lens lens divides the entire wide beam of the light source into multiple thin beam illumination, and the vertical axis inhomogeneity within the range of each thin beam, the superposition of thin beams in a symmetrical position, the vertical axis inhomogeneity of the thin beam is compensated, so that the light energy in the entire aperture is effectively and uniformly utilized. The light spot emitted from the second row of the  flyeye lens lens is focused on the illumination screen through the condenser. In this way, every point of the spot on the lighting screen is illuminated by the light emitted from all the points of the light source.At the same time, the beam from each point on the light source will overlap within the same field of view on the illuminated spot, giving a uniform spot.

Simple diagram of light source:

Optical design effect drawing:

Usually the common  flyeye lens on the market is generally divided into two kinds: Silica glass flyeye lens and Plastic flyeye lens. Silica glass flyeye lens has more advantages because of its high temperature resistance, corrosion resistance, good thermal stability, good light transmittance and other characteristics, compared with Plastic flyeye lens, often used in exposure machine, micro-display and high-end home appliances and other fields. According to the market research, the use of Silica glass flyeye lens in the market showed a 20% annual growth trend.

The difference between Silica glass flyeye lens and Plastic flyeye lens:

Comparison between Silica glass flyeye lens and Plastic flyeye lens after laser irradiation:

Q: How to distinguish between the quality of the  flyeye lens? What equipment can be distinguished from it?

A: In addition to the traditional test methods, you can also choose high-tech, accurate test methods. We have added a spot test machine and a transmittance tester, and the spot test machine can be judged by the size, shape, and sharpness of the spot hit. Generally speaking, the four sides of the normal light spots are more sharp, the concentrating effect is better, the abnormal light spots are more smooth, the four sides of the light spot will be scattered around, the concentrating effect is very poor. The transmittance tester can identify whether the material can achieve the transmittance and the stability of the coating band through the curve shown by the transmittance test.  

Examples of light spots:

With the rapid development of optical technology, many optical technologies have been widely used. Silica glass flyeye lens lens, as a rising star of optical lens, has been recognized by the market after more than 10 years of development. In the application of laser, it presents a growing trend every year. I believe that in the future development will be getting better and better!