Custom Infrared Lens, thermal imaging cameras & systems components
What are the disadvantages of the nested guide mechanism commonly used in continuous zoom lenses?

What are the disadvantages of the nested guide mechanism commonly used in continuous zoom lenses?
A.
In the continuous zoom process, the distance between each lenses has been
strictly determined. At the structural design step, there are strict
requirements on the size of the lens group and the lens barrel, and it is not
easy to adjust
B.
Increasing the axial length of the guide rail can make the lens group more
stable during the movement, but due to the limitation of the infrared optical
design, the lens group has a limited range of movement. Once the range is too
small, it will cause transmission problems
C.
Under special circumstances, it is necessary to use a zoom lens with nested
motion, which increases the complexity of the structure and increases various
costs.
The
shortcomings listed above are only individual phenomena, which can be improved
from the source, that is, when carrying out the optical design of the
continuous zoom lens, these problems should be taken into account, and the
optical design can be carried out on the basis of avoiding these shortcomings.
solve these problems.


