Although, Photographic optical lens can be used as objective projected. But Projectionobjective has some different.
虽然，照相物镜可以用作放映物镜，但放映物镜还是有一些不同之处。
2
The relation between aberrations of the telecentric projectionobjective and the pitch CCD is discussed. The criterion of correcting aberrations in the telecentric projectionobjective is also given.
讨论远心投影物镜像差和CCD节距的关系，给出远心投影物镜校正像差的依据。
3
Any real time objective aspect of the projection will then be lost.