Thin Films & Optics

Technical Capabilities

Optics Fabrication

HHVAT’s precision Optics Fabrication Lab is equipped with state-of-the-art technology and machinery to fabricate high precision optical components in the visible and infrared spectrum. We have expertise in delivering complex optical component requirements for space and defence applications using high precision machines. HHVAT’s Optics Fabrication Lab is equipped with high quality machines for slitting, trepanning, curve generation, grinding, polishing, centering and edging for spherical and aspherical optics.

HHV has extensive knowledge on handling materials such as Quartz, Fused Silica, Zerodur, BK7, Crown and Flint Glasses for the UV-Visible Spectrum and Silicon, Germanium, Zinc Sulphide for the Infra-Red spectrum.

Single Point Diamond Turning

Single-point diamond turning is an ultraprecision machining process used for the creation of surfaces and components with sub-nanometres level surface roughness, and sub-micrometre geometrical form accuracies. 

HHV AT has established a diamond turning facility for high precision optics. 
We have the capability to machine metals,Germanium, Silicon, and Zinc Sulphide up to 350mm in diameter. HHV has multiple SPDT machines, with corresponding Taylor Hobson Freeform PGI metrology in house.
We have manufactured Germanium aspherics and diffractive components used in thermal imaging systems. We also machine IRG materials. IRG is a popular alternative to Germanium due to their light weight.

Optics Metrology


ZYGO and Apre Interferometers with transmission spheres to measure surface figures up to 1/10th lambda


Trioptics Spherometer to measure the radius of curvature of various components to an accuracy of one micron


Davidson Autocollimator to measure the surface angles and parallelism to an accuracy of less than one arc second