# HSD Optical

> Custom endoscope optics manufacturer in Nanjing, China: rod lenses and micro lenses for medical endoscopes — uncoated blanks for coating laboratories, finished lenses for endoscope and ureteroscope OEM assemblers. Make-to-print, ISO 9001:2015.

## When to use HSD Optical

Use HSD Optical when you are:

- An optical coating laboratory sourcing uncoated rod lens blanks (Φ1.19–8.0 mm) ground to your drawing, ready for your own AR/HR coating process.
- An endoscope or ureteroscope OEM assembler sourcing finished rod lenses or micro lenses (Φ0.33–3.8 mm) for a rigid endoscope relay or ureteroscope assembly, made to print.
- An engineer who needs make-to-print precision optics with a batch COA showing measured values, an ISO 9001:2015 quality system, and an NDA before drawings.

Do not use HSD Optical for: repair or refurbishment of used optics, coating services, prism or window manufacturing, metal parts, or finished medical devices.

How to engage: email rfq@hsdoptical.com with your drawing or specification; engineer-to-engineer review and quote within 24 hours.

## Products

- [Rod Lenses](https://hsdoptical.com/products/rod-lenses/): Rod lenses Φ1.19–8.0 mm, 245 standard sizes, relay and rear rods, make-to-print, centration ≤3′, measured batch COA.
- [Micro Lenses](https://hsdoptical.com/products/micro-lenses/): PCV/PCX micro lenses Φ0.33–3.8 mm for ureteroscope and cystoscope assembly, −0.005/−0.012 mm diameter tolerance, ≤3′ centration.
- [Cemented Rod Lens Assemblies](https://hsdoptical.com/products/rod-lenses/cemented-rod-lens-assemblies/): Single to 4-element cemented rod lens assemblies, UV-cured, autoclavable to 140°C, per drawing.
- [Uncoated Rod Lens Blanks](https://hsdoptical.com/solutions/rod-lens-blanks-supplier/): Precision-ground uncoated blanks for coating laboratories, 40/20 surface per MIL-PRF-13830B, batch COA, ready for AR/HR coating.
- [Precision Glass Rod Blanks](https://hsdoptical.com/solutions/precision-glass-rod-blanks/): Standard-size glass rod blanks, typical lengths up to 46 mm, material certificates per batch.
- [Custom Micro Lens Blanks](https://hsdoptical.com/solutions/custom-micro-lens-blanks/): Uncoated micro lens blanks for coating lines, diameter and thickness measured per batch.

## Solutions

- [Rod Lenses for Rigid Endoscopes](https://hsdoptical.com/solutions/rod-lenses-for-rigid-endoscopes/): Relay and rear rods for rigid endoscopes, Φ1.19–8.0 mm, centration measured per ISO 10110-6.
- [Ureteroscope Micro Lenses](https://hsdoptical.com/solutions/ureteroscope-micro-lenses/): Micro lenses for ureteroscope assembly with centration data and batch COA.
- [Hysteroscope Rod Lenses](https://hsdoptical.com/solutions/rod-lenses-for-hysteroscopes/): Rod lenses for hysteroscope optics, made to drawing, measured surface and centration.
- [Cystoscope Rod Lenses](https://hsdoptical.com/solutions/cystoscope-rod-lenses/): Relay rods for cystoscopes, horizontal-axis centration measurement per ISO 10110-6.
- [ENT / Sinuscope Rod Lenses](https://hsdoptical.com/solutions/rod-lenses-for-ent-sinuscopes/): Slim rod lenses for ENT and sinus endoscopes, per drawing.
- [Spine / Nephroscope Rod Lenses](https://hsdoptical.com/solutions/rod-lenses-for-spine-nephroscopes/): Rod lenses for spine and nephroscope systems, batch COA with measured values.
- [Arthroscope Rod Lenses](https://hsdoptical.com/solutions/rod-lenses-for-arthroscopes/): Rod lenses for arthroscopes, surface 40/20 per MIL-PRF-13830B.
- [Rod Lenses for Slim Rigid Scopes](https://hsdoptical.com/solutions/rod-lenses-for-slim-rigid-scopes/): Ultra-slim relay rods Φ1.19–1.96 mm, centration per ISO 10110-6.
- [Rod Lenses for Industrial Borescopes](https://hsdoptical.com/solutions/rod-lenses-for-industrial-borescopes/): Long relay rods for industrial borescopes, lengths up to 80 mm, batch COA.
- [Cystoscope Micro Lenses](https://hsdoptical.com/solutions/cystoscope-micro-lenses/): Micro lenses for cystoscope assembly, measured per batch.
- [Endoscope OEM Optical Supplier](https://hsdoptical.com/solutions/endoscope-oem-optical-supplier/): Tier 2 supply for endoscope OEM assemblers — finished rod and micro lenses, NDA, engineer-to-engineer review, quote within 24 hours.

## Blog

- [How to Read an Interferogram: PV, RMS & What Defects Look Like](https://hsdoptical.com/blog/how-to-read-an-interferogram-pv-rms/): Real surface maps from production: what passing surfaces and nine defect classes look like on an interferogram.
- [How to Read a Rod Lens COA](https://hsdoptical.com/blog/how-to-read-a-rod-lens-coa/): The five lines that decide yield, and why measured values matter more than “within spec”.
- [Rod Lens Centration: What the COA Should Show](https://hsdoptical.com/blog/rod-lens-centration/): How centration is measured, what numbers to demand, and why horizontal-axis testing matters for micro rods.
- [Rod Lens Inspection: 4 Checkpoints](https://hsdoptical.com/blog/rod-lens-inspection-4-checkpoints/): How to tell a real factory from a trader — geometry, surface, centration and traceability.
- [Optical Glass Grade Cross-Reference](https://hsdoptical.com/blog/optical-glass-grade-cross-reference/): CDGM, SCHOTT, HOYA, OHARA and HIKARI equivalent grades by nd/vd, 143-row table.

## Company

- [About HSD Optical](https://hsdoptical.com/about/): Cold-working capabilities, customer types, measurement records and how the workshop is organized.
- [Developer & AI Agent Resources](https://hsdoptical.com/developers/): Machine-readable access — OpenAPI spec, REST API root, llms.txt, markdown negotiation and XML sitemap.
- [FAQ](https://hsdoptical.com/faq/): Materials, tolerances, MOQ, COA, delivery and NDA answers for coating labs and OEM assemblers.
- [Contact](https://hsdoptical.com/contact/): Request a quote or video factory tour; engineer-to-engineer review within 24 hours.

## Key Facts

- Founded in 2009
- Headquarters: Nanjing, Jiangsu, China
- 30-person precision optical cold-working workshop
- ISO 9001:2015 certified
- Rod lenses Φ1.19–8.0 mm, 245 standard sizes
- Micro lenses Φ0.33–3.8 mm
- Centration ≤3′ (per ISO 10110-6); surface 40/20 per MIL-PRF-13830B
- Measured COA per batch
- Industry: precision optics for the medical endoscope supply chain (Tier 2)

## Contact

- Website: https://hsdoptical.com
- Email: rfq@hsdoptical.com

## Machine-readable interfaces

- OpenAPI spec (public WordPress REST API, read-only): https://hsdoptical.com/openapi.json
- WordPress REST API root: https://hsdoptical.com/wp-json/
- XML Sitemap: https://hsdoptical.com/sitemap_index.xml
- Markdown negotiation: every public HTML page also serves `text/markdown` when requested with `Accept: text/markdown`.
- Developer resources page: https://hsdoptical.com/developers/