GL13-NIR Plano-Concave Lens with Broadband NIR Anti-Reflective Coating (650–1050 nm & 1000–1650 nm), Ø4–50 mm
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | GL13-NIR |
| Component Category | Optical Element |
| Coating | Dual-Band AR (650–1050 nm & 1000–1650 nm) |
| Available Diameters | 4 mm to 50 mm |
| Substrate Material | N-BK7 (standard), optional fused silica or CaF₂ upon request |
| Surface Quality | 40–20 scratch-dig |
| Clear Aperture | ≥90% of diameter |
Overview
The GL13-NIR Plano-Concave Lens is a precision optical component engineered for collimation, beam expansion, and divergence control in near-infrared (NIR) and short-wave infrared (SWIR) optical systems. Fabricated from high-homogeneity N-BK7 optical glass (with fused silica or calcium fluoride available as custom alternatives), this lens features a plano surface on one side and a spherical concave surface on the other—producing negative focal power ideal for diverging incident collimated light. Its defining technical attribute is the dual-band anti-reflective (AR) coating, optimized for two critical spectral windows: 650–1050 nm (covering visible red through standard silicon detector cutoff) and 1000–1650 nm (encompassing the telecom O-, E-, S-, C-, and L-bands). This broadband performance ensures minimal Fresnel reflection losses (<0.25% average R per surface) across both bands, directly enhancing system throughput and signal-to-noise ratio in spectrometers, OCT systems, free-space laser communication links, and NIR spectroscopy modules.
Key Features
- Negative focal lengths ranging from –20 mm to –1000 mm, enabling flexible optical design for divergent beam manipulation
- Dual-wavelength AR coating deposited via ion-assisted e-beam evaporation, meeting MIL-C-48497A durability standards (adhesion, humidity, abrasion)
- Center thickness tolerance: ±0.05 mm; radius of curvature tolerance: ±0.2%; focal length tolerance: ±1%
- Surface quality compliant with ISO 10110-7: 40–20 scratch-dig specification; plano surface flatness ≤λ/4 @ 632.8 nm
- Standard mounting compatibility with industry-standard lens mounts (e.g., SM1-threaded, RMS, or kinematic cell interfaces); mechanical drawings and mounting recommendations provided in product catalog (Page 100)
- Traceable metrology documentation available upon request, including interferometric surface profile reports and spectral reflectance data
Sample Compatibility & Compliance
The GL13-NIR series is designed for integration into Class 1 laser-safe optical benches and OEM instrumentation platforms operating under ambient laboratory conditions (15–30 °C, <60% RH non-condensing). All lenses meet RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 requirements. While not certified to IEC 61000-4 electromagnetic immunity standards as a standalone passive component, the lenses are routinely qualified for use in systems conforming to ISO 13485 (medical devices), IEC 61000-6-3 (EMC emission), and FDA 21 CFR Part 11-compliant data acquisition environments when embedded in validated optical subsystems. Coating spectral performance is verified per ISO 9211-3:2021 (optical coatings — environmental durability testing), including 96-hour damp heat exposure and 10-cycle thermal shock (-40 °C to +70 °C).
Software & Data Management
As a passive optical element, the GL13-NIR requires no firmware or embedded software. However, comprehensive optical design support is provided: Zemax OpticStudio and CODE V prescription files (.zmx, .seq) are available for all standard configurations upon request. Spectral reflectance curves (350–2000 nm), interferometric surface maps, and mechanical CAD models (STEP, IGES) are delivered digitally with each order batch. For traceability in regulated environments, calibration certificates include unique serial numbers, measurement dates, and technician signatures—fully compatible with laboratory quality management systems (QMS) supporting ISO/IEC 17025:2017 audit requirements.
Applications
- Beam shaping in fiber-coupled NIR laser diode systems (e.g., 785 nm Raman excitation, 980 nm pump sources)
- Diverging optics in Fourier-transform infrared (FTIR) spectrometer interferometer arms
- Reference path elements in Michelson and Mach-Zehnder interferometers operating at 1310 nm or 1550 nm
- Collimation correction in SWIR imaging systems using InGaAs focal plane arrays
- Optical cavity design for tunable external-cavity diode lasers (ECDLs) targeting the NIR water absorption band (940 nm)
- Alignment and null optics in optical coherence tomography (OCT) engine development
FAQ
What substrate materials are available besides standard N-BK7?
Fused silica (for improved UV transmission and lower thermal expansion) and calcium fluoride (CaF₂, for extended transmission beyond 2 µm) are offered as custom options—lead times and pricing vary by diameter and coating configuration.
Can the AR coating be customized for a single narrowband wavelength?
Yes. Single-wavelength AR coatings (e.g., centered at 1064 nm or 1550 nm) are available under the GL13-CW series; minimum order quantity applies.
Is there a version with enhanced laser-induced damage threshold (LIDT)?
For pulsed laser applications (e.g., ns-pulse Nd:YAG harmonics), we offer LIDT-optimized versions with magnetron-sputtered coatings and superpolished surfaces (≤5 Å RMS roughness); LIDT data is provided per ISO 21254-1:2018 test reports.
Do you provide mounting hardware or lens cells?
Standard SM1-threaded lens mounts (e.g., LM1XY, CP1, or KCB1 series) are recommended and stocked; full mechanical integration packages—including kinematic mounts, cage system adapters, and alignment stages—are available through our optical subsystem division.
Are Zemax files and tolerance analysis included with purchase?
Zemax prescription files and basic tolerance sensitivity reports (using Monte Carlo sampling per ISO 10110-5) are supplied at no cost for standard configurations; advanced tolerancing (e.g., RSS, worst-case, or statistical stack-up) is available as a consulting service.
