What materials are used for the lens?

The lens substrate is made of high-quality N-BK7 optical glass, known for its excellent homogeneity and low inclusion content.

What payment methods are accepted?

We accept T/T, Western Union, LC, D/P, PayPal, and small-amount payments.

High-Quality Bk7 Double Concave Lens for Crystal Clear Vision

Name: High-Quality Bk7 Double Concave Lens for Crystal Clear Vision
Brand: Shanghai Rui Tai Photoelectric Technology Co., Ltd.
SKU: 2252919445

Shanghai, ChinaShanghai Rui Tai Photoelectric Technology Co., Ltd.

US$50.00

100-499 Pieces

US$45.00

500-999 Pieces

US$40.00

1,000+ Pieces

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

3r Policy-Return, Replace, Refund

Warranty

12months

Model NO.

RAYTEK-OL-0011#

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

Surface Quality

40-20 Scratch-Dig or Custom Manufacturing

Surface Flatness

Lambda/4 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

6.35mm-50.8mm or custom manufacturing

Trademark

Raytek

Origin

China

HS Code

9002909090

Production Capacity

100000PCS Per Year

Key features

N-BK7 Optical Glass: High-quality N-BK7 substrate with excellent homogeneity and low bubble content.

AR Coating Options: Multi-layer AR coatings (AR.14/16/18/33) with reflectivity <0.5% for specific wavelengths.

Customizable: Custom sizes, shapes, focal lengths (-12.5mm to -500mm), and coatings available.

Wide Application: Ideal for laser beam expansion, imaging, medical devices, and scientific instruments.

3R Warranty: Quality warranty with Return, Replace, and Refund policy for inferior-quality products.

Fast Delivery: Quick lead time of 7-10 days for standard orders.

Certified Quality: Products certified with RoHS, ISO9001, and CE standards.

Company profile

High Repeat Buyers ChoiceImporters and ExportersR&D CapabilitiesManagement Certification

Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 9 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.92h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company with a stated 10,000-square-meter production base and multiple processing machines. It holds an ISO9001:2015 certificate, reports established complaint-handling and corrective-action procedures, and offers broad customization services. Export experience is stated as nine years, with exports representing 51%–70% of sales and markets including South America and Europe. Production quantities and peak-season fulfillment information are provided, but the supplier reports no new products in the past year, no ODM or SDK capability, no overseas agents, warehouses, showrooms, or inventory service. Financial information is incomplete and inconsistent across the supplied records, so financial credibility cannot be confirmed. No specific customer cases or named brand OEM experience are provided.

CertificationsThe supplier reports holding an ISO9001:2015 certificate. This is explicit evidence of a quality-management certification, but no additional certification details or validation information are provided.

After-Sales capabilityThe supplier has clear procedures and followed records for corrective and preventive actions and customer complaint handling. However, the quality-assurance status is unknown, so the evidence supports a positive service-process assessment but not a complete after-sales capability evaluation.

R&D capabilityThe supplier reports no new products during the past year, no ODM service, and no available SDK. These are explicit limitations in recent product innovation and development-related services.

Production capacityThe supplier describes a 10,000-square-meter production base with water-jet, CNC, milling, and other processing equipment, reports 6–10 quality-control staff, and lists production quantities for several product categories. It also states peak-season order fulfillment within 15 working days, providing explicit evidence of production resources and operational capacity.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization, and flexible customization. These services are reported consistently across the two records, indicating broad customization coverage.