| 摘要 |
Selective optical resonator comprising at least two mirrors and a selective means disposed between two of these mirrors, said means being constituted by: an at least partial linear polarization means for the light in a direction P, a first birefringent plate having two neutral lines, one forming an angle alpha 1=0 with direction P, an optically active substance having a birefringence with dispersion and which rotates the light polarization direction by an angle theta dependent on the wavelength of the lambda light, a second plate which is identical to the first having two neutral lines, one forming the angle alpha 2= theta with the direction P, whereby the resonator is then selective for said wavelength lambda .
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