Fused Silica Double-Concave (DCV) Lenses
Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths.
Description
Double Concave lenses(biconcave lens) are manufactured with two concave surfaces to provide a negative focal length. The lens is also called a negative or diverging lens.
What kinds of materials can Elyonoptic use to make Double-Concave (DCV) Lenses?
CDGM optical glasses, SCHOTT, OHARA, Fused Silica, Sapphire, Germanium, Silicon, calcium fluoride (CaF2), Zinc Selenide (ZnSe), and other infrared materials.
What services can Elyonoptic provide?
- Small batch products are numbered,and each product of provider the ZYGO surface data,Diameter data,Center thickenss data,Total height data,center bias data
- Large-scale products provide five-thousandths of product data
- Provide the proof of product material
- Coating products provide coating curve
How long is Elyonoptic delivery date?
10-300pcs:15-25days
1000-5000pcs:35days
5000-10000pcs:45days
(Specific delivery date suggestions and sales verification)
We deliver bulk products in batches
Specifications:
| Specification | Value |
|---|---|
| Materials | Optical glasses, Fused Silica, Sapphire, Germanium, Silicon, Calcium Fluoride (CaF2), Zinc Selenide (ZnSe), and other materials |
| Diameter Tolerance | +0.0 / -0.05 mm |
| Focal Tolerance | ±2% |
| Surface Quality | 40-20, 20-10, 10-5 |
| Centration | 1 arc min |
| Surface Flatness | N=3, △N=0.5 or better |
| Clear Aperture | 90%, 95%, 100% |
| Bevel | Protective |
| Coating | Optional |
FAQs
1. What is your MOQ for fused silica double-concave (DCV) lenses?
Our standard MOQ is 50 pieces for regular production.
For small orders (≤50 pcs), we can still accept production and provide full inspection reports and measurement data for each piece upon request.
2. Do you support small batch or prototype orders?
Yes. We support small batch and prototype production for testing and evaluation before mass production.
3. What is your production lead time?
- Standard polished fused silica windows: 4–5 weeks
- Coated optical windows (AR / HR): 5–6 weeks, depending on coating type and specifications
4. Do you provide inspection reports?
Yes. We provide quality inspection reports based on order quantity:
- ≤50 pcs: Full inspection data for each piece available
- 100–1,000 pcs: 5%–10% random sampling inspection reports
- >1,000 pcs: 0.5% sampling inspection reports
All inspection data includes dimensional and surface quality parameters.
5. What coating options are available?
We offer:
- Anti-Reflection (AR) coatings
- High-Reflection (HR) coatings
- Broadband coatings
- Custom wavelength coatings (UV / Visible / IR)
6. Can you manufacture custom sizes and shapes?
Yes. We support OEM manufacturing according to drawings.
Available shapes include:
- Round
- Square
- Rectangular
- Stepped
- Wedged
- Drilled / special structures
7. What quality certifications do you have?
We are certified under international quality management systems, including:
- ISO 9001 Quality Management System
- IATF 16949 Automotive Quality System
- Good Standardization Practices Certification
We also apply strict internal quality control processes, including dimensional inspection, surface quality testing, and coating performance verification before shipment.
