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About HSD Optical

Our Company

Focused on What We Do Best

Founded in 2009, HSD Optical is a specialized Tier 2 manufacturer of precision optical components for medical endoscopy. Based in Nanjing, China, with a dedicated team of 30 specialists.

We are an optical cold-working workshop — grinding, polishing, centering, and (when needed) AR coating — with spindle polishing machines and centering machines on our rod lens and micro lens lines.

We supply uncoated blanks to coating laboratories and finished lenses to OEM assemblers — serving the full upstream supply chain of rigid endoscopes and ureteroscopes worldwide.

We are make-to-print: you send the drawing, we make the parts. Your print is reviewed by our own engineers, and a quote comes back within 24 hours.

Send Your Drawing →

Focus

Rod lenses & micro lenses only.

Stable

Mature processes built for long-term repeat orders.

Agile

30-person team, short chain, fast response.

Trusted

ISO 9001:2015 certified, COA per batch.

🏭 Factory — Nanjing

Production

What "Cold-Working" Means Here

Every lens passes through our own workshop — ground, polished, centered, and measured on equipment we operate ourselves.

Grinding & Polishing

Spindle polishing machines

Spherical grinding and polishing of rod lenses and micro lenses to drawing tolerance.

Centering

Centering machines

Optical centering and edge grinding — the basis for the centration values on every COA.

Cementing

Cemented assemblies

Single, double, 3-element and 4-element cemented configurations per drawing.

Inspection

Per-batch inspection

Dimensions, centration and surface quality checked per batch; measured values on the COA.

Supply Chain

We Serve Two Types of Customers

Whether you run your own coating line or assemble finished instruments, we have the right solution for you.

Coating Laboratories

We supply uncoated blanks (white parts) precisely ground to your specs. You handle the coating in your own facility. Perfect for labs with in-house AR or HR coating capability.

Uncoated Blanks

OEM Assemblers

We supply fully coated, ready-to-assemble lenses to your drawing. Broadband AR coating 400–700nm standard. Custom wavelengths available. Made to your drawing and ready for your assembly line.

Finished Lenses

Why HSD Optical

Built for Tier 1 Assemblers

We don't just make lenses. We measure, document, and stand behind every single batch.

Professional Focus

Rod lenses and micro lenses, made in-house — no compromise on quality.

Stable Quality

Strict dimensional control and batch consistency. Process locked — no undocumented changes.

Engineer-to-Engineer

We review your drawings for manufacturability and optical path compatibility before production starts.

Fast Response

Quote within 24 hours. MOQ from 10 pieces. Sample lead time depends on your drawing's complexity.

NDA Protected

All drawings and specs are strictly confidential. We sign your NDA or ours before you send anything sensitive.

Long-Term Partnership

Annual framework contracts welcomed. Locked process and full COA on every batch.

Measurement Records

Real records from our workshop

Interferometry, centration and surface inspection — the actual measurements behind every COA. Every batch ships with measured values; rejects go back to the polishing floor as process feedback.

Interferometric surface verification at HSD Optical — Interferometer verification

Rod lens centration measured at 2.02 arcmin — Centration measured — 2.02′

HSD Optical technician inspecting optical surface with a video microscope — Video microscope surface inspection

Interferometer workstation measuring a passing surface PV 0.51λ — Interferometer workstation — passing surface

Interferometer measuring head close-up with spoke defect PV 4.325λ — Measuring head close-up

Passing surface map PV 0.51λ RMS 0.059λ — smooth optical surface — Passing surface — PV 0.51λ / RMS 0.059λ

Local defect surface map PV 1.126λ, Ø13.22 mm — Local defect caught — PV 1.126λ

Multiple scratches surface map PV 2.67λ, Ø32.61 mm — Multiple scratches — PV 2.67λ

Diagonal scratch band surface map PV 2.867λ, Ø36.14 mm — Diagonal scratch band — PV 2.867λ

Single scratch defect map PV 2.876λ RMS 0.325λ — Single scratch — PV 2.876λ

Spoke defect surface map PV 4.325λ, Ø38.17 mm — Spoke defect — PV 4.325λ

Large aperture lens interference fringes PV 0.141λ — Large-aperture fringes — PV 0.141λ

See the Factory Live — Schedule a Video Tour

Watch rod lens grinding, polishing, centration measurement and final inspection in real time. All information shared during the tour is confidential — your NDA is welcome.

Schedule a Live Video Tour