What certifications do your products have?

Our products are certified with RoHS, ISO9001, and CE.

What are the typical applications for these lenses?

They are used in laser processing, spectroscopy, imaging, astronomy, and medical diagnostics.

Premium N-Bk7 Double Concave Lens for Telescopes - Biconcave Spherical Optics

Name: Premium N-Bk7 Double Concave Lens for Telescopes - Biconcave Spherical Optics
Brand: C-Laser (Taicang) Material Technology Co., Ltd.
SKU: 2255070905

Jiangsu, ChinaC-Laser (Taicang) Material Technology Co., Ltd.

US$50.00

100-499 Pieces

US$45.00

500-999 Pieces

US$40.00

1,000+ Pieces

Sample price:US$16.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

3r Policy-Return, Replace, Refund

Warranty

12months

Model NO.

OL-0028

Usage

Lighting, Medical, Optical, Photography, Laser, Astronomy, Imaging, Detection, etc

Type

Bi-Concave Lenses

Transmittance

Central 90% of Diameter

Shape

Single-lens

Material

Optical Glass

Lenses Color

Clear

Certification

RoHS, ISO9001, CE

Customized

Coating

Ar.14, Ar.16, Ar.18, Ar.33 Coated

Substrate

N-Bk7 Optical Glass or Equivalent N-Bk7

Surface Quality

40-20 Scratch-Dig or Custom Manufacturing

Effective Focal Length(Efl)

From -12.5mm to -500mm

Surface Accuracy, Irregularity

Lambda/4 or Custom Manufacturing

Transport Package

Cartons or Wood Case

Specification

6.35-50.8mm or custom manufacturing

Trademark

C-LASER

Origin

China

HS Code

9002909090

Production Capacity

100000PCS Per Year

Key features

Multi-Material Selection: Available in N-BK7, UV Fused Silica, CaF2, MgF2, and ZnSe for diverse spectral needs.

Flexible AR Coating: Customizable multi-layer AR coatings (Ar.14-33) or uncoated options to reduce reflection losses.

Full Customization: Supports customization from samples, designs, and full custom manufacturing for EFL and shape.

100% Quality Inspection: Every lens undergoes strict visual and functional inspection before delivery.

Fast Production Lead Time: Efficient production with lead time within 15 workdays for both peak and off-season.

12-Month Warranty: Comprehensive 12-month warranty with 3R policy for returns, replacements, and refunds.

Company profile

High Repeat Buyers ChoiceIn-stock CapacityMinor CustomizationManagement Certification

C-Laser (Taicang) Material Technology Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 Year CertifiedNearest Port: Shanghai PortAverage Response Time: ≤1.03h

AI-Powered supplier vetting

SummaryThe supplier demonstrates a broad optical, glass, instrument, communication-equipment, and related technical business scope. It reports extensive customization options, recent new-product activity, ODM and OEM services, documented R&D processes, and stated annual capacities for several optical products. Quality and service procedures are documented and followed, including complaint handling, corrective actions, finished-product inspection, and supplier assessment. Manufacturing capacity is supported by valid contracts with associated subcontractors and in-stock capability. However, the provided information does not identify certifications, gives no substantive financial figures or clear financial assessment, and indicates no overseas agents, branches, warehouse, showroom, or SDK. Customer evidence is limited to OEM service for unnamed popular brands and participation in one trade show.

Supplier typeThe supplier’s stated scope includes technical services, communication-equipment manufacturing and sales, optical-instrument manufacturing, optical and functional-glass manufacturing, and sales of instruments, technical glass, non-metallic minerals, mechanical equipment, and software. This supports classification as an optical and technical-glass manufacturer with related equipment and technical-service activities.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions, customer complaints, supplier-service assessment, and finished-service quotation and lead-time arrangements. It also reports inventory capability and trade-show participation, but has no overseas agents or branches, overseas warehouse, or overseas showroom, which limits demonstrated overseas support coverage.

R&D capabilityThe supplier reports new products during the past year, ODM availability, R&D engineers responsible for new-product development and production technology support, and design tools including AutoCAD, Pro/E, and SolidWorks. R&D input, output, review, verification, and validation documents are available for audit, although no SDK is available.

Production capacityReported annual capacities include 100,000 optical lenses, 10,000 optical windows, 150,000 laser windows, 10,000 tons of fused quartz, and 10,000 rolls of optical fiber. The supplier also states that valid manufacturing contracts exist with each associated subcontractor, maintains inventory capability, and reports peak- and off-season lead times within 15 workdays.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. These options are reported for both R&D/design services and the grinding-facility context, indicating broad product adaptation capability.