Benefits of an Aspheric Lens

Spherical Aberration Correction
The most notable benefit of aspheric lenses is their ability to correct for spherical aberration, an optical effect which causes incident light rays to focus at different points when forming an image, creating a blur. Spherical aberration is commonly seen in spherical lenses, such as plano-convex or double-convex lens shapes, but aspheric lenses focus light to a small point, creating comparatively no blur and improving image quality. Spherical aberration is inherent in the basic shape of a spherical surface and is independent of alignment or manufacturing errors; in other words, a perfectly designed and manufactured spherical lens will still inherently exhibit spherical aberration. An aspheric lens can be designed to minimize aberration by adjusting the conic constant and aspheric coefficients of the curved surface of the lens.

Optical grade LiTaO3 wafers-Hangzhou Shalom

  • Quasi-phase matching for SHG and OPO
  • Pyroelectric Infrared Detectors
  • Optical fiber communications applications

Hangzhou Shalom EO offers the Optical grade LiTaO3 wafers/crystals/substrates and Optical grade LT wafers/crystals/substrtates, advanced facilities are equipped for crystals growing, wafer cutting, wafer lapping, wafer polishing and wafer checking.

Orientation Z-cut±0.2°
Diameter 76.2mm±0.3mm
Orientation Flat(OF) 22mm±2mm

Perpendicular to X±0.2°

Second Refer Flat(RF) 10mm±3mm

Cw270°±0.5°from OF

Cw315°±0.5°from OF

Thickness 500μm±5μm


Surface Double sides polished

S/D 20/10

TTV ≤10μm
WARP ≤50μm
Curie Temperature 605℃±0.7℃(DTA method)
Edge Beveling Edge rounding

Note, other type of customized LT wafers or substrates are available upon request.

Crystal Optics

Crystal-based X-ray optics are essential and critical optical components of synchrotron light sournces and XFELs. The Crystal Optics section has comprehensive in-house infrastructure, capabilities and expertise for fabricating and developing almost all kinds of crystal-based X-ray optics, including crystal monochromators, analyzers, high-heat-load monchromators, beam splitters, polarizers, mirror substrates, ultrahigh-resolution crystal optics systems, FEL crystal optics, etc., for APS beamlines as well as
Expertise includes:

Designing crystal optics with X-ray dynamical-theory calculations and modeling to achieve desired resolution, efficiency, acceptance, etc.,
Fabricating (and refurbishing) ultrahigh-quality crystal optics (Si, Ge, quartz, sapphire, diamond), from precise orienting, cutting/dicing, grinding, etching, to strain-free polishing
X-ray characterization and testing of crystal optics using X-ray topography and double-crystal rocking curve imaging.