A multilevel diffraction grating in the resonance-domain is employed for femtosecond pulse compression based on the principle of temporal superresolution. As the number of levels increases, effects of included higher diffraction orders become more significant. This results in tough challenge for the use of multilevel diffractive optical elements for pulsed light even at the design stage.
Triplet structure is proposed in order to correct both chromatic and spherical aberrations of diffractive lens systems. Simmulated annealing is emplyed to optimise spatial frequency distribution of diffractive lenses.
A hybrid hologram is a volume hologram recorded interferometrically, using the output wavefront of a computer-generated hologram as an object wave. It thus has the advantage of high diffraction efficiency of a volume hologram and the flexibility of a computer-generated hologram. We apply the thin grating decomposition method for the numerical analysis of the properties of hybrid holograms. The effects of several parameters in recording and reconstruction on the quality of the regenerated image are investigated using hybrid kinoform beam array generators as an example.
The potential of silver halide emulsion as a low-cost material for noninterferometric recording of computer-generated phase holograms is evaluated by contact-printing binary-amplitude masks on this material. This process is found to result in a nonbinary surface-relief profile with appreciable overshoot in the vicinity of the intended phase jumps. Interestingly, the refractive-index modulation profile compensates for this effect, resulting in a nearly binary phase delay profile. Residual absorption in the emulsion and pattern transfer errors, most noticeable within small features, are found to limit the array size that can be achieved with a given period. The feasibility of the application of silver halide emulsion in recording holograms with a continuous profile is discussed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.