The secondary imaging instrument, as a high-precision measuring equipment, is widely used in industrial inspection, precision manufacturing and other fields. Its core function is to measure and locate objects with high accuracy. In order to realize these functions, the lens selection of the secondary imaging instrument is crucial.

Among the many types of lenses, zoom lenses have become the first choice for secondary imaging instruments because of their unique advantages. Variable-magnification lenses have the following distinctive features:

1, accurate measurement and fast positioning: the zoom lens can provide high-resolution images, thus meeting the needs of the secondary imaging instrument to accurately measure the object. At the same time, its fast zoom speed also ensures the fast positioning of the target object.

2, excellent optical performance: zoom lens using advanced optical design, to ensure that the image of high definition and low distortion. This is crucial for the secondary imaging instrument, because any small image distortion may affect the final measurement results.

3, high numerical aperture N.A. value: High numerical aperture means that the lens is able to collect more light, thus improving the brightness and contrast of the image. This is especially important for the measurement of the secondary imaging instrument in the complex light environment.

4, high-precision repetitive positioning: in multiple measurements, the zoom lens can maintain high-precision repetitive positioning, thus ensuring the accuracy of each measurement. This is critical for application scenarios that require multiple repetitive measurements.

5, durability and reliability: the zoom lens is made of high-hardness alloy materials to ensure its extended service life. At the same time, its mechanical structure is designed to be sturdy and reliable, able to maintain stable performance in a variety of harsh environments.

The zoom lens has become the lens of choice for secondary imaging instruments due to its advantages of accurate measurement, fast positioning, excellent optical performance, high numerical aperture N.A. value, high precision repeatability of positioning, as well as durability and reliability.