Disk drive flat optics:design factors affecting manufacturing and cost in volume.
Polarizers and beam splitters for optical drives are small but expensive. Crystalline, prismatic, or cemented optics can often be replaced with coated flats of comparable performance- Cost drivers are examined, and spectral comparison is made between a plate and cube polarizer. Moisture stability of thin film coatings is discussed, and related applications examined, especially those involving control of the relative phase shift between S and P polarization on reflection. Processes now exist enabling the volume manufacture of these optics.
R P
RP
Westney
B L
BL
Swaby