The compound polarizer.

摘要: THE compound polarizer is a device for producing beams of polarized light variable colours in the field microscope ocular. The proper consists disk ‘Polaroid’, polythene and ‘Rayophane’, that order from source ; each these disks can be rotated around common axis. analyser ‘Polaroid’ within as near objective possible; it fixed with respect to rotation but slide upwards downwards objectives are changed by nosepiece. beam passing through specimen examined must convergent, condition fulfilled ordinary substage condenser no lens removed. fully uncrossed position relative other. assemblage works follows.