Coligh specializes in providing high-precision micro-nano optical (DOE) and diffraction grating solutions for cutting-edge optical systems worldwide. We offer end-to-end technical support—spanning design, fabrication, and metrology—for applications including medical and aesthetic lasers, LiDAR, high-precision analytical instruments, AR/VR waveguide displays, and advanced optical communications.
Our current product portfolio includes:
- Aluminum-coated reflective blazed gratings
- Diffraction phase transmission gratings
- Blazed concave diffraction gratings
- Slanted gratings
- Diffraction amplitude gratings
Our core manufacturing and R&D capabilities include:
- High-precision photolithography and electron-beam exposure systems, which enable precise control over sub-wavelength feature sizes and specific groove blaze angles when fabricating high-spatial-frequency gratings, ensuring both uniformity and high diffraction efficiency in mass production.
- Advanced deposition capabilities for broadband, high-reflectivity metallic coatings and high-extinction-ratio chromium (Cr) absorbing layers, achieving high reflectance across a broad spectrum—from ultraviolet to infrared—without altering the original nano-groove morphology.
- For our entire product line, we provide detailed reports on micro-morphology (including groove pitch, groove depth, blaze angle, and duty cycle) verified via Atomic Force Microscopy (AFM) or Scanning Electron Microscopy (SEM). Additionally, we supply empirical data on surface figure and wavefront distortion, measured using Zygo interferometry.
