A Large Field Compensator of the Berek Type

Fisher, W.A.P.

doi:10.1038/161848a0

Cited by 4 publications

(1 citation statement)

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“…Such types of variable retarders, commonly known as Bereck compensators, have been created by utilizing the uniform frozen stress in resins. 2 Variable retardance can also be effected through the use of electrooptical effects such as the Pockels effect. The major disadvantage of such retarders is the high operating voltages, that are required, with 4 KV being the typical half-wave voltage for a Pockels cell using KD * P. 3 More recently, liquid crystal variable retarders have been widely used.…”

Section: Introductionmentioning

confidence: 99%

Three-element variable retarder for monochromatic light

Saha¹,

Bhattacharya

Chakraborty

2010

Opt. Eng

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A technique is described for the continuous variation of the resultant retardance and effective privileged directions of a cascaded system of three optical retarders. The system consists of a rotatable retarder sandwiched between two fixed, identical, parallel retarders. The primary aim of the study was to develop a simple technique for a variable retarder for monochromatic light, but the robustness of the system for a narrow band on either side of the design wavelength was also studied. Simulated plots show that a linear variation of the effective retardance from 0 to 2 is achievable, as is a linear variation of the effective azimuth from 0 to . It is also shown that these two parameters may be varied independently of each other.

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Section: Introductionmentioning

confidence: 99%