wave plate

(redirected from Lambda plate)

wave plate

[′wāv ‚plāt]
(optics)
A plate of material which is linearly birefringent. Also known as retardation plate; retardation sheet.
References in periodicals archive ?
A lambda plate is required to separate the 4.2 k liquid helium bath and the 1.9 k superfluid helium bath.
The polarizer and analyzer filters are placed in the crossed position (which produces the darkest matrix position), and a sensitive tint plate (lambda plate) may be inserted to further enhance coloration as in the ductile iron sample in Fig.