Study and Development of a Simulation Infinite Depth of Field Optical Pickup

摘要

Sufficient depth of field is an inherent problem in all conventional optical pickup designs. The solution in the past has been to operate at higher f-numbers and accept the increased object-lighting requirements. In Phase I of this program, several techniques were investigated that utilized the Schiempflug condition to increase the depth of the field without affecting the f-number of the pickup. Of these techniques, one proving especially useful involved the tilting of the final imaging lens about its rear nodal point to compensate for the final image tilt. (Author)