Method of adjusting the compensation for pupil delay in a convergent or divergent beam
A method of adjusting the pupil delay compensation of a convergent or divergent beam that includes placing a device composed of an afocal system comprising one or more passive optical components disposed on the propagation axis of the beam, at least one of the components being a focusing diffractive component, and moving the device along the propagation axis of the beam until the required pupil delay compensation is obtained, where the compensation is the algebraic sum of pupil delays of each passive optical component of the afocal system and lying in a range of values the limits of which are functions of the particular combination of the optical components chosen to form the afocal system of the compensation device.
1. A method of adjusting the pupil delay compensation of a convergent or divergent beam propagating along a propagation axis, the method comprising:
providing a device including an afocal system comprising one or more passive optical components disposed along an axis, wherein at least one of the components comprises a focusing diffractive component,
placing the afocal system on the propagation axis of the beam, the axis of the afocal system being coaxial with the propagation axis of the beam, and
moving the device along the propagation axis of the beam until a required pupil delay compensation is obtained,
wherein the delay compensation comprises the algebraic sum of intrinsic pupil delays of each of the one or more passive optical components of the afocal system and is within a range of delay compensation values, where the limits of the range comprise functions of the combination of the one or more passive optical components in the afocal system of the device.
2. The method of adjusting pupil delay compensation according to claim 1 , wherein the afocal system comprises a set of lenses, wherein at least one of the lenses is diffractive, the afocal system having a magnification of ±1.
3. The method of adjusting pupil delay compensation according to claim 1 , wherein the focusing diffractive component comprises a phase diffractive component or a volume diffractive component.
4. The method of adjusting pupil delay compensation according to claim 3 , wherein the focusing diffractive component comprises a diffractive lens, a diffractive Fresnel lens, or a diffraction grating.
5. The method of adjusting pupil delay compensation according to claim 1 , wherein the afocal system has a magnification of ±1, the passive optical components comprise lenses and at least one of the lenses comprises a diffractive lens.
6. The method of adjusting pupil delay compensation according to claim 5 , wherein the focusing diffractive component comprises two lenses having the same absolute focal-length value f 0 , a convergent lens and a divergent lens, wherein one of the two lenses comprises a refractive lens and the other of the two lenses comprises a diffractive lens.
7. The method of adjusting pupil delay compensation according to claim 5 , wherein the afocal system has a magnification of ±1, the passive optical components are lenses and at least one of the lenses is a diffractive lens.