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Ultra-Thin N-BK7 Windows are precision optical components designed for applications where minimal optical path length, low wavefront distortion, and compact system integration are critical. Manufactured by Band Optics, these windows are produced exclusively under a custom optics wholesale model, supporting OEMs, system integrators, and research institutions worldwide.
N-BK7 optical glass is the industry-standard substrate for visible and near-infrared applications due to its excellent homogeneity, low inclusions, and stable optical performance. When processed into ultra-thin formats, it enables lightweight designs without compromising optical quality. At www.band-optics.com, our engineering team specializes in translating customer drawings and performance targets into scalable, production-ready optical windows.
N-BK7 is a borosilicate crown glass equivalent to SCHOTT N-BK7, widely accepted across imaging, sensing, and laser systems. Its balance of performance, availability, and cost efficiency makes it a default choice for precision optical windows.
Key material advantages include:
High transmission across the visible to near-infrared spectrum
Low dispersion suitable for imaging systems
Excellent polishability for high surface quality
Ultra-thin optical windows typically refer to thicknesses of 0.5 mm and below. Reducing thickness minimizes optical path difference and lowers induced aberrations, which is critical for compact optical assemblies.
Benefits include:
Reduced system weight
Lower spherical aberration contribution
Improved compatibility with miniaturized opto-electronic modules
All Ultra-Thin N-BK7 Windows from Band Optics are produced on a made-to-order basis. We do not offer retail inventory. Instead, we focus on stable batch production, repeatability, and long-term supply for custom optics wholesale clients.
Supported customization options include:
Diameter or rectangular dimensions
Thickness down to 0.1 mm (application-dependent)
Surface quality and flatness grades
Broadband or single-wavelength AR coatings
Each production batch undergoes strict inspection using interferometric testing, surface quality inspection, and dimensional metrology. This ensures that every shipment meets the agreed optical and mechanical specifications.
| Parameter | Typical Specification |
|---|---|
| Material | N-BK7 Optical Glass |
| Refractive Index (nd) | 1.5168 @ 587.6 nm |
| Transmission Range | 350 nm – 2000 nm |
| Thickness Range | 0.1 mm – 0.5 mm (custom) |
| Surface Quality | 60-40 / 40-20 (optional 20-10) |
| Flatness | λ/4 @ 632.8 nm (optional λ/10) |
| Parallelism | ≤ 3 arcmin |
| Coating Options | Uncoated, AR (VIS / VIS-NIR) |
| Manufacturing Mode | Custom optics wholesale |
Ultra-Thin N-BK7 Windows are commonly used as protective windows in industrial cameras, machine vision systems, and scientific imaging devices where optical distortion must be minimized.
For low- to medium-power laser applications, ultra-thin windows provide effective environmental protection while maintaining beam quality, especially when paired with optimized AR coatings.
In CMOS, CCD, and photodetector modules, reduced window thickness supports tighter packaging and improved signal integrity.
ISO 9001 certified optical manufacturing facility
In-house polishing, coating, and inspection lines
Stable batch production for long-term programs
Our optics are supplied to customers across industrial automation, medical optics, and scientific research sectors. Long-term partnerships and repeat orders validate our manufacturing consistency.
In most optical industries, window thicknesses of 0.5 mm or less are classified as ultra-thin, with 0.3 mm and 0.2 mm being common targets.
Yes. Band Optics specializes in build-to-print manufacturing and works directly from customer drawings or optical specifications.
We support prototype batches as well as volume production, depending on the project scope and specifications.
All products are manufactured in ISO-certified facilities under controlled optical production processes.
