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One of the most important advantages of telecentric lenses is that changes in object distance do not affect the magnification of the image. Due to the unique technical advantages of telecentric lenses, the current requirements for high-precision testing such as mechanical parts measurement, plastic parts measurement, glass products and medical parts measurement, and electronic component measurement are particularly suitable for precision measurement occasions.

Under what circumstances will a bi-telecentric lens be used:

1. When the thickness of the detected object is large and more than one plane needs to be detected, typical applications such as food boxes, beverage bottles, etc.;

2. When the placement position of the measured object is uncertain, it may be at a certain angle to the lens;

3. When the measured object jumps up and down during the detection process, such as the vibration of the production line causing the working distance to change;

4. When the measured object has an aperture or a three-dimensional object;

5. When low distortion rate is required, and the brightness of the image effect is almost the same;

6. When the defect to be detected can only be detected under parallel illumination in the same direction;

7. When it is necessary to exceed the detection accuracy, such as when the allowable error is 1um.

Specific application scenarios of telecentric lenses

1. Mechanical parts measurement

The most common application of telecentric lenses is to measure the size of precision mechanical parts. Telecentric lenses are mainly used to measure precision mechanical parts, such as springs, screws, nuts and washers.

2. Measurement of plastic parts

Another main application of telecentric lenses is to measure rubber seals, O-rings and plastic caps. The characteristic of the object is that it is easy to deform when moving and measuring, and the traditional measurement method is more difficult. The detection method of these parts requires the use of non-contact optical measurement technology.

3. Electronic component measurement

Many other components (such as resistors, triodes and integrated circuits) need a small telecentric lens to check their integrity, size, specifications, position and pin curvature, and electronic drawing boards need to check the spacing of each component. Other electronic products such as transistors and IC circuits must use a telecentric lens to detect their size and the location of their connection points, while circuit boards are often used to control the distance between electronic components.

4. Measurement of glass products and medical parts

Many pharmaceutical glassware, such as vials, capsules and vials, are generally measured with a telecentric lens to ensure complete sealing and prevent damage to the vessel. There are similar applications in the beverage manufacturing industry, such as measuring the thread of a glass bottleneck. Other passive medical devices such as syringes also require telecentric inspection system technology.

5. Other special purposes

There are some other applications of telecentric lenses, such as:

1. Particle measurement;

2. High-precision color measurement in printing industry;

3. Photolithography mask layer measurement;

4. Filter control;

5. Blood analysis and cell measurement.