N-Bk7 Parallel Window/N-Bk7 Optical Windows/Parallel Optical Windows/Schott B-Bk7 Lens

• After-sales Service: 3r Policy-Return, Replace, Refund
• Warranty: 12months
• Usage: Lighting, Medical, Optical, Photography, Laser, Astronomy, Imaging, Detection, etc
• Type: Optical Windows
• Transmittance: >95%
• Shape: Single-lens
• Model NO.: RAY-OW041#
• Material: Optical Glass
• Lenses Color: Clear
• Certification: RoHS, ISO9001, CE
• Customized: Customized
• Coating: Broadband Coating
• Substrate: Schott N-Bk7 Glass
• Surface Quality: 10-5 Scratch-Dig or Custom Manufacturing
• Surface Flatness: Lambda/20 at 632.8nm or Custom Manufacturing
• Coating Type: 245nm to 1550nm
• Thickness: 6-10mm or Custom Manufacturing
• Transport Package: Cartons or Wood Case
• Specification: 12.7mm-50.8mm or custom manufacturing
• Trademark: Raytek
• Origin: China
• HS Code: 9002909090
• Production Capacity: 100000PCS Per Year

Product Description

General Introduction: The laser level optical window of Raytek has excellent parallelism of < 30 arc seconds, which can minimize the transmission beam offset. Both sides of the window have broadband antireflection coatings, which can be used for visible or infrared applications.
N-bk7 is an excellent lens material for most visible and near infrared applications. It is the most common borosilicate optical glass, which can provide excellent performance and moderate price. N-bk7 is a good choice for transmission optics because of its high uniformity, less bubbles, low impurities and easy fabrication.

Products Name: N-BK7 Parallel Window
Alias: N-BK7 Parallel Window, N-BK7 windows, N-Bk7 optical window, Parallel N-BK7 window, Parallel N-Bk7 optical window, N-bk7 laser window, N-BK7 optical windows, N-BK7 optics windows,etc

Lens Substrates:
N-BK7
 

Optional I:	N-BK7 from CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,ETC
Optional II:	Equivalent N-BK7 Made in China, C-laser own brands

Coating:
Broadband visible antireflection coating
Raytek's AR.14 broadband multilayer antireflection coating can significantly improve the transmittance of these lenses by reducing the surface reflection in the wavelength range of 430-700 nm. The antireflection coating can be used in multiple visible wavelengths and tunable lasers without using multiple optical elements. Broadband visible antireflection coating
Raytek's AR.14 broadband multilayer antireflection coating significantly improves the transmittance of these lenses by reducing the surface reflection in the wavelength range of 430-700 nm. The antireflection coating can be used in multiple visible wavelengths and tunable lasers without using multiple optical elements.
Broadband multilayer Infrared Antireflective Coating
Raytek offers two multilayer antireflection coating options for infrared and near infrared applications. Our ar.16 coating is recommended for near infrared applications in the range of 650-1000 nm. Our ar.18 coating is suitable for infrared applications in the range of 1000-1550 nm

Main Applying:

Applying Fields I:	Visible applications Infrared applications.
Applying Fields II:	Other
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Products Highlights:
1).These n-bk7 parallel windows achieve the highest accuracy in the manufacturing process
2).Laser grade for the most demanding applications
3).Surface flatness <=λ/20, 10-5 scratch-dig
4).Parallel to less than 30 arcsec, so that the transmission beam offset is minimum
5).Wide band antireflective coatings are suitable for visible or near infrared applications 6).Different grades materials for option.
7).High precision & high surface roughness;
8).Sizes can be customized as per the customers' request
9).Quick lead time and delivery time.
10).Matching super optics custom and processing capacity, including Moulding, CNC machining, Polishing, Particle beam processing, Magnetic flux conversion processing, Grinding, Coating, Lightweighting, Custom Shaping, Counterbores, Drilling & Coring, Edge & Bevel Polishing,3D Contouring, Bevels & Chamfers, Steps & Slots, Laser Cutting & Marking, Metrology & Inspection, Precision Pitch Polishing, Double-Sided Polishing, Optical Assembly, Measuring, etc.
11).Excellent post-sale quality warranty, with "3R"-return, replace & refund policy

Main Optical Tech Specification:

Lens Shape	Optical Parallel Window	Surface Accuracy Irregularity	-
Lens Material	N-BK7	Diameter Tolerance	+0/-0.15 mm
Antireflection Coating	Broadband coating	Chamfers	12.7 & 25.4 mm: 0.25-0.75 mm face width 50.8 mm: 0.38-1.14 mm face width
Coating Type	245nm to 1550nm	Chamfers Angle/Tolerance	45° ±15°
Damage Threshold	7.5 J/cm^2, 10 ns pulses, 20 Hz for coated models	Transmitted Beam Deviation	±30 arc sec
Thickness Tolerance	±0.25 mm	Wedge	≤30 arc sec
Surface Quality	10-5 scratch-dig	Clear Aperture	Central 85% of diameter
Surface Flatness	λ/20 at 632.8nm	OEM/ODM	Accepted

Popular Physical Size Specification:
 

Basic Data	Value
Popular Dia.Value I	12.7mm/25.4mm/50.8mm,etc
Matching Thickness I	6.0mm/10.0mm,etc
Surface Flatness I	10-5 scratch-dig
Parallelism(Wedge) I	≤3 arc min; ≤3.5arc min;
AR. Coating Model I	Uncoated 430-700nm/650-1000nm/1000-150nm
Popular Dia.Value II	-
Matching Thickness II	-
Surface Flatness II	-
Parallelism II	-
Other Size Speicification	Custom manufacturing as per demand

Main Cooperation Materials Manufacturers:
CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC

Main Export Countries & Areas:
Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.

Raytekoptics Extra value added services offered:
1). Optical workcraft & process solution design;
2). Rough processing raw materials;
3). Semi finishing raw materials;
4). Fabricate custom sizes and shapes;
5). Design and supply custom coatings;
6). Modify and resurface customer supplied materials;
7). Drill holes, notch glass and provide beveled substrates;
8). Precision polish optics with non-standard aspect ratios;

Payment Method: by T/T or Western Union.
Delivery time: 7-10 days.
Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offers quality warranty for our optics products with "3R" policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.