The visual inspection part of this kind of equipment is composed of a camera, a lens and a light source. Among them, the lens is the most complex, often composed of a set of modules, the lens multiple is large, the accuracy is very high, and may be paired with a prism steering device, and the structure is complex. After a series of combinations, its structure often has the disadvantage of poor light transmission, and the brightness of conventional light source is difficult to meet the detection requirements.
In order to meet the requirements of detection accuracy and speed, it is necessary to match a very bright light. Early commonly used halogen lamp lighting, halogen light is higher, the spectrum is more complete and continuous, has certain advantages. However, halogen lamps also have shortcomings such as short life, high energy consumption, large heat output, high maintenance costs, and can no longer meet the changing market and modern energy conservation and environmental protection requirements.
The new LED optical fiber light from LOTS can replace the traditional halogen light, LED optical fiber light has a long life (up to 60,000 hours), brightness up to 20 million Lux, environmental protection (in line with RoHS standards), good uniformity (no halo, no bright spots and dark areas); It is a high-quality fiber optic light, the service life is more than 20 times that of imported halogen light, and the power consumption is only 1/10 of halogen light, which can greatly reduce the maintenance cost of the product.
Semiconductor product testing requirements are different, for different products and detection characteristics, often need to replace different bands of light sources, or with a variety of filters used in combination to filter out unwanted features. However, this method is too cumbersome, and it is easy to touch other parts of the mechanism during replacement to affect the accuracy.
In order to meet the requirements of multi-band detection, our company has developed a multi-color switching optical fiber light based on monochrome optical fiber light, that is, our three-color optical fiber light. Only one can achieve three-color RGB luminescence, three colors can emit light independently or mixed luminescence, and can also freely control and change various band colors to achieve multi-spectral detection. It can effectively simplify the structure of the light and save the space of the mechanism.
Applications：
Case1：Wafer hole burr inspection
After wafer processing, there may be burrs and residue on the surface to affect the subsequent process. To detect such small holes, it is necessary to cooperate with a high-magnification lens to see fine burrs. After passing through a prism module lens, the light will be weakened a lot. Using a high-brightness fiber light to irradiation, the brightness is satisfied and the burr contrast is obvious.
Case2：Wafer or glass circuit inspection
Such detection products have very small features and require small field of view imaging with lens magnification. Usually, the brightness of the light source is particularly high, and the brightness of the traditional point light is not enough, the brightness of the LED fiber light is met, and the spot is uniform.
Case 3：LED chip circuit inspection
Because the product background has a variety of colors, the use of monochrome light can not meet the diversity of product detection; The use of three-color optical fiber light can adjust the light irradiation of different band colors according to the change of products.
Fiber optic light is widely used in the semiconductor industry, its high brightness, long life, low power consumption, greatly reducing the maintenance cost of products. The three-color optical fiber light can realize a variety of products for a light , improve the compatibility of product detection, and simplify the hardware part of vision. Our fiber light source category is complete, covering 365~1550nm wavelength range, welcome customers to consult sample.
