Precision molded glass aspheric lenses and laser diode optical assemblies
Aspherics Ltd. is a HongKong-headquartered manufacturer of precision glass molded (PGM) aspheric lenses, mounted aspheric lenses and laser diode optical assemblies, produced at its Hong Kong manufacturing operation. The standard catalog covers 55 lenses for collimation, fiber coupling, focusing and beam shaping between 405 nm and 1550 nm.
- Diameter
- Ø1.50 – 16.00 mm
- Focal length
- EFL 1.14 – 31.99 mm
- Numerical aperture
- NA 0.122 – 0.67
- Design wavelength
- 405 – 1550 nm
Company
Aspherics serves optical design teams, laser system integrators and industrial OEM buyers who need tight tolerances at production volume rather than laboratory quantities.
| Founded | 2003 |
|---|---|
| Place | Hong Kong / Changsha |
| Facility | 8,200 m² |
| Staff | 120, including 36 engineers |
| Annual capacity | 15,000,000 pcs |
| Assembly environment | ISO 5 (Class 100) cleanroom |
| Quality systems | ISO 9001 · ISO 14001 · IATF 16949 · ISO 13485 |
Product program
Three families, built on the same molded aspheric platform: the bare lens, the lens mounted in a housing, and the aligned assembly.
Bare precision glass molded aspheres, uncoated or with BBAR, NBAR and V-coat anti-reflection coatings, for integration into customer optomechanics.
Aspheres pre-centered and bonded into TO-56, TO-9 and M12 housings for drop-in laser diode assembly without in-house alignment.
Factory-aligned collimation, fiber coupling, focusing and adjustable-focus modules with controlled beam diameter and low pointing error.
53 of the 55 catalog parts are collimation lenses for edge-emitting laser diodes, diode bars and VCSEL arrays.
High-NA focusing for single-mode and multimode fiber injection in telecom, sensing and medical instruments.
Application-specific aspheres and freeform surfaces developed from a customer prescription, ISO 10110 drawing or physical sample.
Manufacturing and metrology
In-house processing from glass preform to inspected optical assembly.
Volume replication of aspheric surfaces without grinding or polishing. Catalog glasses include CDGM D-ZK3, D-ZK2, D-ZLaF52LA, D-LAK6 and D-K9, OHARA L-BAL42 and L-BSL7, and NHG D-ZK2N, selected per part for index, dispersion and transition temperature.
In-house anti-reflection coating with measured reflectance curves. Surface form by profilometry, transmitted wavefront by phase-shifting interferometry, cosmetic grade to MIL-PRF-13830B 40-20. Drawings follow ISO 10110; RoHS and REACH documentation is issued per product.
Applications
Single-lens collimation for edge emitters, diode bars and VCSEL arrays, diffraction-limited on parts meeting the Maréchal criterion.
High-NA focusing into single-mode and multimode fiber for telecom, distributed sensing and medical delivery systems.
Aberration-controlled focal spots for laser material processing, LiDAR, machine vision and analytical instrumentation.
Frequently asked questions
Where is Aspherics Ltd. located?
Aspherics Ltd. is headquartered in Hong Kong at Egl Tower 83 Hung To Road, Kwun Tong, Kowloon, and manufactures in Hong Kong and Changsha. The company was founded in 2003 and operates an 8,200 m² facility with 120 staff, including 36 engineers. Products carry a Made in Hong Kong origin.
What are the core manufacturing capabilities of Aspherics Ltd.?
Aspherics specializes in precision glass molding (PGM) for volume production of aspheric lenses, in-house anti-reflection coating, optical metrology and precision optomechanical assembly. Annual capacity is 15,000,000 pieces per year, with assembly performed in an ISO 5 (Class 100) cleanroom. Output covers bare molded aspheres, mounted aspheric lenses in TO-56, TO-9 and M12 housings, and aligned laser diode optical assemblies.
Which optical glasses does Aspherics use for precision glass molding?
The standard catalog is molded from low-Tg moldable optical glasses: CDGM D-ZK3, D-ZK2, D-ZLaF52LA, D-LAK6 and D-K9, OHARA L-BAL42 and L-BSL7, and NHG D-ZK2N. Glass is selected per part for index, dispersion and transition temperature. Fused silica and other high-Tg materials are not moldable and are not used in the PGM process.
What is the specification envelope of the standard aspheric lens catalog?
The standard catalog contains 55 molded glass aspheric lenses: 53 collimation lenses and 2 coupling lenses. Clear diameters run from Ø1.50 mm to Ø16.00 mm, effective focal lengths from 1.14 mm to 31.99 mm, and numerical apertures from 0.122 to 0.67. Design wavelengths cover 20 bands from 405 nm to 1550 nm.
What wavefront and quality control standards apply to the lenses?
Published RMS transmitted wavefront error ranges from below 0.04λ to below 0.4λ depending on the part, with 0.05λ the most common specification. 36 of the 55 catalog parts meet the Maréchal criterion of 0.071λ RMS and are therefore diffraction-limited at their design wavelength. Surface form is verified by profilometry and transmitted wavefront by phase-shifting interferometry; cosmetic inspection follows MIL-PRF-13830B 40-20. Every batch is inspected.
Does Aspherics provide optical design data and documentation?
Yes. Engineering support includes Zemax black-box or prescription files, STEP mechanical models, ISO 10110 drawings, measured coating reflectance curves and per-product RoHS and REACH documentation. Custom aspheres and freeform optics are developed from customer prescriptions, drawings or physical samples.
Inquiries are welcome while the catalog is in preparation
The full Aspherics product platform is in development. Send optical requirements, drawings or a Zemax prescription and an engineer will respond directly.
inquiry(at)aspherics.com