Shanghai Longway Special Glass Co., Ltd.
| Payment Terms | D/P,T/T,Western Union |
| Supply Ability | 35000 Piece/Pieces per Month |
| Packaging Details | electrolytic capacitor paper, foam, carton, pallet |
| Structure | Double Convex |
| Name | Optical Bi-Convex Lens |
| Transmission | over 92% |
| Coating | available |
| Processing | grinding and polishing |
| Application | Optics and lighting |
| OEM | available |
| Usage | Optics |
| Brand Name | LONGWAY |
| Model Number | LW16092213 |
| Certification | ISO9001 |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | D/P,T/T,Western Union | Supply Ability | 35000 Piece/Pieces per Month |
| Packaging Details | electrolytic capacitor paper, foam, carton, pallet | Structure | Double Convex |
| Name | Optical Bi-Convex Lens | Transmission | over 92% |
| Coating | available | Processing | grinding and polishing |
| Application | Optics and lighting | OEM | available |
| Usage | Optics | Brand Name | LONGWAY |
| Model Number | LW16092213 | Certification | ISO9001 |
| Place of Origin | Shanghai, China | ||
| High Light | Precision Bi-Convex Lens ，N-BK7 Optical Glass ，Optical Lens For Microscopes & Tools | ||
Precision N-bk7 Optical Glass Bi-convex Lens For Microscopes & Tools
1. Material & Manufacturing
Optical Substrate: Schott N-BK7 borosilicate glass (standard reference 517642)
Surface Precision:
λ/4 surface accuracy @ 632.8nm
60-40 scratch-dig specification
Coating Options: Broadband AR (MgF₂ or multilayer) for >99.5% peak transmission
2. Critical Properties
Optical Performance:
>92% transmission (350nm–2.0μm uncoated)
Abbe number 64.2 (minimizes chromatic aberration)
Thermal/Mechanical Stability:
CTE: 7.1 × 10⁻⁶/K
Knoop hardness: 610 kg/mm²
Precision Tolerances:
Focal length: ±1%
Center thickness: ±0.05 mm
Centration: < 3 arcminutes
3. Core Functions
Beam Convergence: Short focal lengths (10–200mm) for high-power focusing
Aberration Correction: Bi-convex design reduces spherical distortion vs. plano-convex alternatives
Collimation: Converts point sources to parallel light for illumination systems
Image Magnification: 2X–20X capability for detailed inspection
4. Professional Applications
Microscopy Systems:
Objective lenses in biological/industrial microscopes
Condenser optics for Köhler illumination
Laser Tools:
Focusing lenses for medical lasers (dermatology/surgery)
Beam expanders in fiber laser cutters
Industrial Equipment:
Barcode scanner optics
Machine vision inspection lenses
Scientific Instruments:
Telescope eyepieces
Spectrometer collimators
| Name | optical glass |
| Material | Optical Glass,Bk-7,Pyrex,Fused Silica,Sapphire,quartz |
| Diameter Tolerance | +0/-0.2 mm |
| Thickness Tolerance | +/-0.2 mm |
| Cler Aperture | over 90% |
| Flatness | ^/4 @632.8nm |
| Surface Quality | 80/50~10/5 scratch and dig |
| Transmission | above 92% |
| Chamfer | 0.1-0.3 mm x 45 degree |
| Focal Length Tolerance | +/-2% |
| Back Focal Length Tolerance | +/-2% |
| Coating | available |
| Usage | opticl system, photographic sysem, Lighting system,Electronic apparatuse.g.laser,camera,monitor,projector,magnifier, telescope,polarizer,electronic instrument,led etc. |
Company Details
Business Type:
Manufacturer,Agent,Exporter,Trading Company,Seller
Year Established:
2008
Total Annual:
1000000-5000000
Employee Number:
30~100
Ecer Certification：
Verified Supplier
Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines... Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines...
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