Rendering with accurate camera models greatly increases realism and improves the match of synthetic imagery to real-life footage. Photographic lenses can be simulated by ray tracing, but the performance depends on the complexity of the lens system, and some operations required for modern algorithms, such as deterministic connections, can be difficult to achieve. We generalise the approach of po...

LLE Review, Volume 80 213 Magnetorheological finishing (MRF) is a novel and recently commercialized1 process for figuring and polishing plano, convex, and concave optics—both spherical and aspherical— from a wide variety of optical materials. A recently written review article provides an overview of the history, theory, and implementation of this technology.2 The utility and productivity of MRF...

Compression molding process can potentially be used to make high precision glass lenses. In a lens molding process, glass raw material is heated above its transition temperature and is subsequently pressed between the two mold halves into a lens shape. Controlled cooling (annealing) of the formed lens is then carried out with the molds in a closed position in order to enable uniform cooling of ...

We prove uniqueness, up to diffeomorphism, of symplectically aspherical fillings certain unit cotangent bundles, including those higher-dimensional tori.

The Center for Optics Manufacturing (COM) at the University of Rochester has made significant advances in the fabrication of precision optical components using deterministic microgrinding with rigid, computer-controlled machining centers and high-speed tool spindles. In deterministic microgrinding, the infeed rate of the microgrinding tool across the optical workpiece is optimized and controlle...

Our first main result states that the spectral norm $$\gamma $$ on \mathrm {Ham}(M, \omega ) , introduced in works of Viterbo, Schwarz and Oh, is continuous with respect to $$C^0$$ topology, when M symplectically aspherical. This statement was previously proven only case closed surfaces. As a corollary, using recent Kislev-Shelukhin, we obtain continuity barcodes aspherical symplectic manifolds...

This paper describes the methods using bonded cup wheels for grinding toroidal and cylindrical SiC mirrors with large curvature radii. Since the angle between the cutting direction of bonded abrasives and feed direction of the cup wheel is about 90 °, it is possible to obtain a surface with very low surface roughness independent of the direction of measurement. Toroidal mirrors, circular and el...

The human mammary gland is a complex and heterogeneous organ, where the interactions between mammary epithelial cells (MEC) and stromal fibroblasts are known to regulate normal biology and tumorigenesis. We aimed to longitudinally evaluate morphology and size of organoids in 3D co-cultures of normal (MCF10A) or pre-malignant (MCF10DCIS.com) MEC and hTERT-immortalized fibroblasts from reduction ...

We present optical photometry and spectra of the peculiar type Ib supernova (SN) 2006jc. Strong He I emission lines indicate the progenitor star exploded inside a dense circumstellar medium (CSM) rich in He. An exceptionally blue continuum persists from our first spectrum obtained 15 days after discovery through our last spectrum ∼1 month later. Based on the presence of isolated Fe II emission ...

Three X-ray data sets of the same D,L-serine crystal were measured at temperatures of 298, 100 and 20 K. These data were then evaluated using invarioms and the Hansen & Coppens aspherical-atom model. Multipole populations for invarioms, which are pseudoatoms that remain approximately invariant in an intermolecular transfer, were theoretically predicted using different density functional theorem...