• N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
  • N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
  • N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
  • N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
  • N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
  • N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass

N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass

Certification: CE, ISO, BV
Application: Rubber, Plastic, Chemical, Construction, Metallurgy, Ceramic, Casting, Glass, Astronomy, Medicine, Biology, Communication, Milit
Type: Optical Glass
Samples:
US$ 200/kg 1 kg(Min.Order)
| Order Sample
1kg cut blank at any size
Customization:
Shipping Cost:

Estimated freight per unit.

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Payment Method: visa mastercard discover JCB diners club american express T/T
  Initial Payment Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
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N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass pictures & photos
N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
US $50-65 / kg
Min. Order: 1 kg
Diamond Member Since 2021

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Secured Trading Service
Rating: 5.0/5
Manufacturer/Factory

Basic Info.

Model NO.
RAY-OS104#
Substrate
N-Bk7 Optical Glass
Cte
7.1*10-6/K (-30 Celsuis Degree to +70celsuis Degr)
Annealing Point
719celsuis Degrees
Transformation Temperature Tg
557celsuis Degrees
Abrasion AA
Ve = 63,96 Vd = 64,17
Transport Package
Wood Case
Specification
300mm*200mm*170mm
Trademark
Raytek
Origin
Germany
HS Code
2811229000
Production Capacity
100000kg Per Year

Packaging & Delivery

Package Size
40.00cm * 40.00cm * 25.00cm
Package Gross Weight
8.000kg

Product Description

General Introduction:
N-BK7 is borosilicate crown glasses with exceptional optical homogeneity. Laser components uses this glass when especially high demands of quality are put on the glass in both transmission and reflection.

BK7 is also a very pure universal optical glass. Among optical glass series products, It is one of the most standard glass types used to produce high-quality optics, mainly for the visible spectrum. The relatively hard borosilicate crown material consists of the purest raw ingredients. It contains very few inclusions and is almost free of bubbles.

Products Name: N-BK7 Glass

Main Characteristics:
1). Excellent quality at a low price.
2). Very good to process: easy to polish. The achievable polishing quality is suited for high power laser applications.
3). Material can be used without exception in transmission in the wavelength range from 400nm to 2000nm.
4). When used as HR mirror, this material can also be used outside of this wavelenght range because the beam does not penetrate the material.
BK7 is a block glass, it is not available as natural blank glass sheets. So, there are no standard thicknesses. Therefore, the glass thickness must be specified individually as per users requirements.

Thermal Properties:
Item Value
Coefficient of Expansion: 7,1 x10-6/K (-30 °C to +70 °C)
  8,3 x10-6/K (+20 °C to +300 °C)
Viscosities:  
Softening Point (107,6 dPa): 719 °C
Annealing Point (1013 dPa): 557 °C
Transformation temperature Tg: 557 °C
Thermal conductivity: 1,114 W/(m x K)
Specific heat capacity: 0,858 J/(g x K)(20 °C ; 100°C)

Mechanical Properties:
Item Unit Value
Density g/cm3 2.51
Yong's Module E GPa 82 x 103 N/mm2
Poisson's ratio μ   0,206
Compression strength GPa -
Bending strength MPa -
Tensile strength MPa -
Torsional rigidity GPa -
Vickers hardness GPa --
Knoop Hardness
HK 0,1/20 (ISO9385)
- 610
Abrasion Aa* - ve = 63,96
vd = 64,17
Refractive index nd - -
Softening point ºC -
Annealing point ºC -
Strain point ºC -
Specific heat(26ºC) kJ/kgK -
Thermal conductivity ratio(26ºC) cal/cm.sec.ºC -
Thermal conductivity ratio(100ºC) Cal/cm.sec.ºC -

Refractive Index name Wavelength (nm) Refractive Index
ni 365,0 1.53627
nh 404,7 1,53024
ng 435,8 1,52668
nF' 480,0 1,52283
nF 486,1 1,52238
ne 546,1 1,51872
nd 587,6 1,51680
nD 589,3 1,51673
n632,8 632,8 1,51509
nC 643,8 1,51472
nc 656,3 1,51432
nr 706,5 1,51289
ns 852,1 1,50980
nt 1014,0 1,50731

Main Applying Fields:
Applying Fields: Typical Applications
1).Demanding optical applications
2).Base material for precision optics
3).Windows, lenses, and prisms
4).Substrates for mirror and filter coatings
5).Measurement and sensor-technology use
6).Lenses and dispersion prims
*****  

Matching Custom Manufacturing Serivce:
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.
Matching processing equipments;
1).Single side lapping and polishing machines
2).Duble sided polishing machines
3).Ring throwing machines
4).DMG five-axis five-linkage spherical milling machine
5).DMG ultrasonic machining center
6).Super large scale gantry cnc machining center (2.0*2.0m)
7).Super large scale surface grinder (1.6m*1.6m)
8).CNC cutting machines
9).Thin plate cleaning machines
10).Ultrasonic trough cleaning machines
11).Plane interferometers
12).Two dimensional detectors
13).Ion beam polishing machines
14).Magnetorheological polishing equipments

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.
N-Bk7 Optical Glass/Optical Glass/Borosilicate GlassN-Bk7 Optical Glass/Optical Glass/Borosilicate GlassN-Bk7 Optical Glass/Optical Glass/Borosilicate GlassN-Bk7 Optical Glass/Optical Glass/Borosilicate GlassN-Bk7 Optical Glass/Optical Glass/Borosilicate GlassN-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
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--return, replace & refund policy.
For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.

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From payment to delivery, we protect your trading.
N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass pictures & photos
N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass
US $50-65 / kg
Min. Order: 1 kg
Diamond Member Since 2021

Suppliers with verified business licenses

Secured Trading Service
Rating: 5.0/5
Manufacturer/Factory
Registered Capital
11600000 RMB
Plant Area
>2000 square meters