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Products / 光学元件 /滤光片 /中性密度过滤器 /BK7/B270反射式ND滤光片 /

BK7/B270反射式ND滤光片

产品概述（BK7）产品概述（B270 ）涂层图表联系下单！

BK7 具有出色的透射率，是通用视觉和近红外应用的理想选择，因此它被用于反射式 ND 滤光片。BK7 反射式 ND 滤光片将入射光束均匀地反射到其表面。通常，它们的表面有金属涂层。透射与反射的比率取决于滤光片的光密度。由于ND滤光片可以在很宽的范围内阻挡光线，因此它们经常用于激光和生物医学应用。

衰减水平由滤光片的光密度（OD）指定。

OD 定义为传输系数的以 10 为底的对数的负数，

该方程式可以表示为：

OD= - Log10 （T/100），

其中 T 是以百分比表示的传输。

例如，T= 1% 的中性密度滤光片的 OD 为 2。

一般规格
材料	BK7型
类型	反射式 ND 滤镜
通带区域（nm）	400-1200
尺寸公差（mm）	±0.2
厚度（mm）	2
厚度公差（mm）	±0.1
平整度	2.5λ@633nm
表面质量	60/40
通光孔径	>90%
平行度（arcmin）	<3
槽	0.2-0.3x45°
损坏阈值（脉冲）	7.5J/cm² (10ns/10 Hz)

B270 对可见光和近红外光具有高透明度，因此使其成为反射式 ND 滤镜的理想选择。B270 反射式 ND 滤光片将入射光束均匀地反射到其表面。通常，它们的表面有金属涂层。透射与反射的比率取决于滤光片的光密度。由于ND滤光片可以在很宽的范围内阻挡光线，因此它们经常用于激光和生物医学应用。

衰减水平由滤光片的光密度（OD）指定。

OD 定义为传输系数的以 10 为底的对数为负数

该方程式可以表示为：

OD= - Log10 （T/100）

其中 T 是 tr的百分比。

例如，T= 1% 的中性密度滤光片的 OD 为 2。

一般规格
材料	B270型
类型	反射式 ND 滤镜
通带区域（nm）	400-700
直径（mm）	25.4
尺寸公差（mm）	+0/-0.2
厚度（mm）	2
厚度公差（mm）	±0.2
平整度	˂2λ@633nm
表面质量	60-40
通光孔径	>90%
平行度（arcmin）	<5
槽	<0.5mmx45°
损伤阈值（脉冲）	7.5J/cm² (10ns/10Hz)

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Optical Density

Diameter (mm)

Search Reset

	Optical Density	Peak Transmittance (%)	Bandpass Region (nm)	Diameter (mm)	Availability	Reference Price (USD)
BK7-RNDF-25.4-0.045 BK7, Reflective ND filter, Diameter=25.4mm, Optical Density:0.045			400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-0.045 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:0.045			400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-0.1 BK7, Reflective ND filter, Diameter=25.4mm, Optical Density:0.1	0.1		400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-0.1 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:0.1	0.1		400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-0.2 BK7, Reflective ND filter, Diameter=25.4mm, Optical Density:0.2	0.2		400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-0.3 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:0.3	0.3	50	400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-0.3 BK7, Reflective ND filter, Diameter=25.4mm, Optical Density:0.3	0.3	50	400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-0.5 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:0.5	0.5		400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-0.5 BK7, Reflective ND Filter, Diameter=25.4mm, Optical Density:0.5	0.5		400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-1 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:1	1	10	400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-1 BK7, Reflective ND Filter, Diameter=25.4mm, Optical Density:1	1	10	400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-1.5 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:1.5			400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-1.5 BK7, Reflective ND Filter, Diameter=25.4mm, Optical Density:1.5			400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-2 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:2	2		400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-2 BK7, Reflective ND Filter, Diameter=25.4mm, Optical Density:2	2		400-1200	25.4	2-3 Weeks	Request for quote
BK7-RNDF-50-3 BK7, Reflective ND Filter, Diameter=50mm, Optical Density:3	3		400-1200	50	2-3 Weeks	Request for quote
BK7-RNDF-25.4-3 BK7, Reflective ND Filter, Diameter=25.4mm, Optical Density:3	3		400-1200	25.4	2-3 Weeks	Request for quote
B270-RNDF-25.4-0.1 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.1					2-3 Weeks	Request for quote
B270-RNDF-25.4-0.2 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.2					2-3 Weeks	Request for quote
B270-RNDF-25.4-0.3 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.3					2-3 Weeks	Request for quote
B270-RNDF-25.4-0.4 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.4					2-3 Weeks	Request for quote
B270-RNDF-25.4-0.5 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.5					2-3 Weeks	Request for quote
B270-RNDF-25.4-0.8 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:0.8					2-3 Weeks	Request for quote
B270-RNDF-25.4-1 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:1					2-3 Weeks	Request for quote
B270-RNDF-25.4-2 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:2					2-3 Weeks	Request for quote
B270-RNDF-25.4-3 B270, Reflective Neutral Density Filter, Diameter=25.4mm, Optical Density:3					2-3 Weeks	Request for quote

B270-RNDF-25.4-3 - Parameter

B270-RNDF-25.4-2 - Parameter

B270-RNDF-25.4-1 - Parameter

B270-RNDF-25.4-0.8 - Parameter

B270-RNDF-25.4-0.5 - Parameter

B270-RNDF-25.4-0.4 - Parameter

B270-RNDF-25.4-0.3 - Parameter

B270-RNDF-25.4-0.2 - Parameter

B270-RNDF-25.4-0.1 - Parameter

BK7-RNDF-25.4-3 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-3 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-2 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-2 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-1.5 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-1.5 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-1 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-1 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-0.5 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.5

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-0.5 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.5

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-0.3 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.3

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-0.3 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.3

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-0.2 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.2

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-0.1 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.1

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-0.1 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

0.1

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-50-0.045 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

BK7-RNDF-25.4-0.045 - Parameter

Type

Reflective ND Filters

Material

BK7

Diameter (mm)

25.4

Diameter Tolerance (mm)

+0.0/-0.2

Thickness Tolerance (mm)

± 0.1

Surface Quality

60-40

Clear Aperture

>90%

Chamfer

<0.5mmx45°

Damage Threshold (pulsed)

7.5 J/cm2 (10ns/10Hz)

Thickness (mm)

Parallelism (arcmin)

Flatness

2.5λ@633nm

Optical Density

Peak Transmittance (%)

Bandpass Region (nm)

400-1200

B270-RNDF-25.4-3 - Download

Download

B270-RNDF-25.4-2 - Download

Download

B270-RNDF-25.4-1 - Download

Download

B270-RNDF-25.4-0.8 - Download

Download

B270-RNDF-25.4-0.5 - Download

Download

B270-RNDF-25.4-0.4 - Download

Download

B270-RNDF-25.4-0.3 - Download

Download

B270-RNDF-25.4-0.2 - Download

Download

B270-RNDF-25.4-0.1 - Download

Download

BK7-RNDF-25.4-3 - Download

Download

BK7-RNDF-50-3 - Download

Download

BK7-RNDF-25.4-2 - Download

Download

BK7-RNDF-50-2 - Download

Download

BK7-RNDF-25.4-1.5 - Download

Download

BK7-RNDF-50-1.5 - Download

Download

BK7-RNDF-25.4-1 - Download

Download

BK7-RNDF-50-1 - Download

Download

BK7-RNDF-25.4-0.5 - Download

Download

BK7-RNDF-50-0.5 - Download

Download

BK7-RNDF-25.4-0.3 - Download

Download

BK7-RNDF-50-0.3 - Download

Download

BK7-RNDF-25.4-0.2 - Download

Download

BK7-RNDF-50-0.1 - Download

Download

BK7-RNDF-25.4-0.1 - Download

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BK7-RNDF-50-0.045 - Download

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BK7-RNDF-25.4-0.045 - Download

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