Optical system provided with a device for augmenting its depth of field,申请号US20080671997-传众专利搜索

Optical system provided with a device for augmenting its depth of field

申请公布号：US8331030(B2)

申请号：US20080671997

申请日期：2008.07.09

申请公布日期：2012.12.11

申请人：

LIEGE BRUNO;TESSIERES REGIS;GUICHARD FREDERIC;KNAUER ETIENNE;NGUYEN HOANG-PHI;DXO LABS

发明人：LIEGE BRUNO;TESSIERES REGIS;GUICHARD FREDERIC;KNAUER ETIENNE;NGUYEN HOANG-PHI

分类号：G02B27/10

主分类号：G02B27/10

摘要：In order to increase the depth of field of an optical system, there is provision to add a phase object, interposed between an object (O) to be imaged and an image plane (8) of the optical system. The phase object is interposed although a chromatic aberration of the system is not yet corrected. After interposition, the measured optical signal is corrected complementarily so as to eliminate the chromatic aberrations therefrom. It is shown that if a parameter of the expansion of the expression, a function of pupil dependency, that the difference in path length of the optical system possesses a significant value of higher order than that of the defocus, then an increase in the depth of field is obtained.