Sub Gauss Technology: Mega Pixel lens development trend
Although in December the test lens style is not much, but because of the incidental collocation test HD camera million million or 2 million, 3 million pixel length of the kinds of the focal length of the lens in the lens in the test, many joined the contrast test of the lens, the harvest is also quite a lot of evaluation.
Resolution of lens images toward high transmittance and high recognition
This test is expected to lens style specification content block, but the actual participants is the diversity of products, from multiple to ultra wide telephoto range, from manual to automatic aperture aperture corresponding to the IR, as well as non near infrared method. Even if this brings some confusion to the performance comparison, we can still sum up several evaluation trends from these numerous tests. First of all, from the megapixel lens this year development can be seen, lens pixels need higher and higher density of light transmittance is in the actual demand is created out of the market, using a higher pixel camera also showed that the degree of progress of HD CCD/CMOS camera still continue to higher resolution the identification of development, so 2 million, 3 million HD megapixel lens has such as crossing the river carp came up the market.
The structural material is oriented to the precision machine manufacturing level
Furthermore, the lens manufacturing process parameters measured in the structure of the classic, more sophisticated mechanical structure and material application technology has been widely applied to different lens categories, non metal material interference technology is widely used for shencechanpin. In addition, the collocation of the camera, the motor and the mechanical structure are more extended. The deformation problem of interference in the past because of the metal structure and plastic material differences, complex and need to adjust the ALC and BLC have ceased to exist, replaced by the adjustment of lens more rapid and convenient installation.
At the same time, combined with the camera lens with a joint part of the structure, also in collocation and camera CCD/CMOS lens mount mechanical back focus or ABF automatic adjustment device for coke, or with the mechanical structure and interface sliding back focus adjustment device between the motor and the more precise mechanical design more precise, this also means the manufacturing technology the whole lens towards more sophisticated automation development. In addition, in the material, there is a high demand. From the test of high density and high light transmittance of non spherical lens, imaging center found imaging part of almost no definition of undesirable phenomena, the only difference is that the recognition rate and the picture around the four corners and the mean detection. The results also show that the difference in lens adoption and selection is also central to the value of the product.
Night focus shift is still the key of night vision lens selection
Similarly, in the day night Camera interchangeable test, you can also see the recent camera manufacturers to optimize the IR near infrared corresponding processing. Whether in camera or directly in the evening, poor illumination environment test, each product tested in the presence of IR near infrared induction focus offset, or still maintain accurate differential performance. Therefore, for the increasingly common day and night monitoring requirements, the corresponding IR HD lens will be the future of a hot market, such as bayonet, road outdoor camera need are necessary conditions for camera collocation. In addition, the test also experience the lens lens coated with good or bad state. From the strength of indoor fluorescent lamp, projection lamp bulb and the test room, plus images of street lights and the measured response advertising signs neon lights can be found, because the light reflection effect on the lens, the light interference image will have different degrees of different forms of light blue or light halo, marginal the red light, but most of the lens coating on the lens have considerable effect. Although there will be such a situation, but from the whole, involved in the testing of lens or collocation a high-definition camera test lens will not have too much of this just passable performance, and even some of the camera are not caused by the interference of light.
Lens in the choice of aperture ratio, transmittance relations, monitor the clarity of the picture
In the test, the performance of each lens is also a focus of attention, that is, aperture ratio. In the past, because of the automatic adjustment and adjustment of the aperture, the screen won't be too bright or too dark, so the user is almost no accounting for the difference between the caliber of the lens and the F value. But millions of high-definition lenses from the test, from F1.0 to F1.8, have been widely used. Maybe we don't care about the past, it is because few people know from F1.2 to F1.4 this caliber than in the light transmittance is a multiple difference to F1.8, is not a general understanding of just 10% or 20% possible difference. This can be seen in the identification test chart clearly. Big caliber is indeed the essence of millions of high-definition lenses, because it's a perfect match for millions of high-definition cameras.
In recent years, the development of lens industry is swift and violent. Hope that with this test, to give the reader some lens manufacturing and application information update at the same time, affect the lens application technology breakthrough again, for the security industry to create new market success.