As an important accessory in the field of industrial automation, telecentric industrial lenses have different model classifications and characteristics. In this article, we will introduce the model classification of telecentric industrial lenses, and explain the differences and respective advantages of each classification.

Telecentric lenses can be divided into object-side telecentric lenses, image-side telecentric lenses and bilateral telecentric lenses according to different design principles.

1. Object-square telecentric lens: The aperture diaphragm is placed on the image-square focal plane of the optical system. When the aperture diaphragm is placed on the image-square focal plane, even if the object distance changes, the image distance also changes, but the image height does not change, i.e. the size of the measured object does not change. In the field of industrial precision measurement and high-precision measurement, the Objective Square Telecentric Lens is a very important optical element that can provide high-quality and high-precision image acquisition and measurement, and it is widely used in a variety of inspection and measurement equipment.

2. Image-square telecentric lens: The aperture diaphragm is placed on the focal plane of the object-square of the optical system. In the case of the object distance remains unchanged, the image distance and magnification will change with the change of the aperture diaphragm position, but the image height will not change. An image-square telecentric lens has advantages in terms of the relative illumination distribution of the image. This facilitates a more uniform image illumination distribution if the light is directed perpendicularly to the sensor.

3. Bilateral telecentric lenses: In bilateral telecentric lenses, the aperture diaphragm is placed on one side of the optical system, both in the object side focal plane or image side focal plane, can be achieved without changes in image height and magnification. Bilateral telecentric lenses combine the advantages of image-side telecentricity and object-side telecentricity. It combines the optical path design of the object-side telecentric and image-side telecentric, which ensures measurement accuracy and has the advantages of fixed imaging magnification and uniform illumination.

When choosing telecentric industrial lenses, understanding the features and advantages of each model can help users better choose the right lens for themselves. The actual selection needs to be based on the actual application scenarios, inspection needs and equipment limitations and other factors for comprehensive consideration.