A zoom lens, as the name suggests, is a lens that can change the magnification. Variable magnification lenses play a vital role in a number of fields, especially where fine observation or inspection is required. Below, we will introduce in detail the classification of zoom lenses, their differences and their applications in different inspections.

Classification of zoom lenses

1. Press whether the magnification is variable or not:

• Single Magnification Lens: These lenses have a fixed magnification that cannot be adjusted. They are suitable for those occasions where the magnification requirements are relatively fixed.
• Variable magnification lens: the magnification of this type of lens can be adjusted according to the needs of a higher degree of flexibility and adaptability.

2. Continuously variable by magnification or not:

• Continuous zoom lens: The magnification can be adjusted continuously and smoothly within a certain range, which is suitable for occasions where fine adjustment of magnification is required.
• Interval zoom lens: The change of magnification is not continuous, but there are several fixed stops to choose from. This type of lens is suitable for occasions where the magnification requirement is not particularly precise.

3. Size by magnification:

• Small magnification lens: relatively small magnification, applicable to the need to observe a larger field of view or for rough observation occasions.
• Large magnification lens: The magnification is large, applicable to the need for fine observation or detection of small objects occasions.

4. The way to zoom by magnification:

• Manual zoom lens: change the magnification through manual adjustment, simple and intuitive operation.
• Automatic (electric) zoom lens: through the electric motor and control system to realize the automatic adjustment of magnification, suitable for the need to quickly and accurately adjust the magnification of the occasion.

Difference in zoom lenses:

There is a significant difference between continuous zoom lenses and interval zoom lenses in the way magnification is adjusted; manual zoom lenses and automatic zoom lenses differ in the way they are operated; and there is a difference between small magnification lenses and large magnification lenses in the degree of fineness of observation. These differences make different types of zoom lenses have unique advantages in their respective fields of application.

Application of zoom lenses:

1、Continuously Variable Magnification Lens: It is widely used in precision inspection in biology, semiconductor, electronics and other fields, such as chip character inspection, circuit board inspection and so on. Its continuously adjustable magnification allows inspectors to precisely adjust the magnification according to different needs, thus obtaining clearer and more accurate images.

2、Interval zoom lens: used in some of the magnification requirements are not particularly accurate occasions, such as appearance inspection, product screening. Its several fixed stops to choose from can meet the needs of inspection in most cases.

3、Manual zoom lens: used in some occasions that require manual operation, such as scientific research experiments, teaching demonstrations. Manual adjustment allows the operator to adjust the magnification according to their own needs at any time.

4、Automatic zoom lens: widely used in automated inspection systems, such as machine vision systems, automated production lines and so on. Its function of automatically adjusting the magnification can greatly improve the inspection efficiency and accuracy.

POMEAS zoom lenses, as an important optical component, play an indispensable role in many fields. Different types of zoom lenses have their own unique properties and advantages, and can meet the needs of inspection in different situations.