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Radial Continuous ND Filters | SIMTRUM Photonics Store

Products / Optics /Filters /Neutral Density Filters /Radial Continuous ND Filters /
Radial Continuous ND Filters
Overview Coating Graph Order Now!

Radial Continuous ND Filters can adjust the intensity of incoming light beam to be transmitted by translating along its diameter to centre axis. The spectrum passes through will continue to maintain its neutral spectrum energy distribution. This filter is commonly used in laser and medical application. By combining two filters, fixed density attenuation effect across a greater area can be obtained. The spectral range of our filters features a wavelength of 250-2500nm.


BK7 is the most common optical glass used in high-quality optical components as it is a hard glass that can withstand a variety of physical and chemical exposure. Relatively scratch and chemical resistant, it has a low bubble and inclusion content, therefore making it an ideal choice for precision lenses. It is the ideal choice for general purpose visual and NIR applications as it has excellent transmission.


General Specifications

Material

BK7

Type

Radial Continuous ND Filter

Standard Deviation of Optical Density

±5%

Diameter Tolerance(mm)

+0/-0.15

Standard Wavelength(nm)

550

Spectral Range(nm)

380-2000

Thickness Tolerance(mm)

±0.1

Standard Linearity

±5%

Surface Quality

40-20

Clear Aperture

>85%

Parallelism(arcmin)    

3

Chamfer

<0.5mmx45°

Damage Threshold(pulsed)

7.5J/cm² (10ns/10Hz)

The level of attenuation is specified by Optical Density (OD) of the filter.

OD is defined as negative of the base 10 logarithm of the transmission coefficient,

The equation can be shown as:


OD= - Log10 (T/100)


Where T is transmission in percentage.

E.g. A Neutral Density Filter with T= 1% has OD of 2.



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Dark Zone

Optical Density

Diameter (mm)


Search Reset
Compare Model Drawings & Specs Spectral Range (nm) Optical Density Diameter (mm) Dark Zone Availability Reference Price
(USD)
BK7-RVNDF-25-1-C
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 1, Dark Zone: Center 		380-2000125Center 2-3 Weeks Request for quote
BK7-RVNDF-25-2-C
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 2, Dark Zone: Center 		380-2000225Center 2-3 Weeks Request for quote
BK7-RVNDF-25-3-C
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 3, Dark Zone: Center 		380-2000325Center 2-3 Weeks Request for quote
BK7-RVNDF-25-4-C
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 4, Dark Zone: Center 		380-2000425Center 2-3 Weeks Request for quote
BK7-RVNDF-50-1-C
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 1, Dark Zone: Center 		380-2000150Center 2-3 Weeks Request for quote
BK7-RVNDF-50-2-C
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 2, Dark Zone: Center 		380-2000250Center 2-3 Weeks Request for quote
BK7-RVNDF-50-3-C
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 3, Dark Zone: Center 		380-2000350Center 2-3 Weeks Request for quote
BK7-RVNDF-50-4-C
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 4, Dark Zone: Center 		380-2000450Center 2-3 Weeks Request for quote
BK7-RVNDF-25-1-E
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 1, Dark Zone: Edge 		380-2000125Edge 2-3 Weeks Request for quote
BK7-RVNDF-25-2-E
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 2, Dark Zone: Edge 		380-2000225Edge 2-3 Weeks Request for quote
BK7-RVNDF-25-3-E
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 3, Dark Zone: Edge 		380-2000325Edge 2-3 Weeks Request for quote
BK7-RVNDF-25-4-E
BK7, Radial Continuous ND Filters, Ø= 25mm, OD = 4, Dark Zone: Edge 		380-2000425Edge 2-3 Weeks Request for quote
BK7-RVNDF-50-1-E
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 1, Dark Zone: Edge 		380-2000150Edge 2-3 Weeks Request for quote
BK7-RVNDF-50-2-E
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 2, Dark Zone: Edge 		380-2000250Edge 2-3 Weeks Request for quote
BK7-RVNDF-50-3-E
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 3, Dark Zone: Edge 		380-2000350Edge 2-3 Weeks Request for quote
BK7-RVNDF-50-4-E
BK7, Radial Continuous ND Filters, Ø= 50mm, OD = 4, Dark Zone: Edge 		380-2000450Edge 2-3 Weeks Request for quote

BK7-RVNDF-50-4-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
4

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-50-3-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
3

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-50-2-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
2

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-50-1-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
1

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-25-4-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
4

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-25-3-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
3

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-25-2-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
2

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-25-1-E - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
1

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Edge

BK7-RVNDF-50-4-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
4

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-50-3-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
3

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-50-2-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
2

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-50-1-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
50

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
1

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-25-4-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
4

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-25-3-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
3

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-25-2-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
2

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-25-1-C - Parameter

Type
Radial Continuous ND Filters

Material
BK7

Diameter (mm)
25

Diameter Tolerance (mm)
+0/-0.15

Surface Quality
40-20

Clear Aperture
>85%

Chamfer
<0.5mmx45°

Damage Threshold (pulsed)
7.5 J/cm2 (10ns/10Hz)

Parallelism (arcmin)
3

Spectral Range (nm)
380-2000

Optical Density
1

Standard Wavelength (nm)
550

Mount Thickness Tolerance (mm)
±0.1

Standard Deviation of Optical Density
±5%

Standard Linearity
±5%

Dark Zone
Center

BK7-RVNDF-50-4-E - Download

BK7-RVNDF-50-3-E - Download

BK7-RVNDF-50-2-E - Download

BK7-RVNDF-50-1-E - Download

BK7-RVNDF-25-4-E - Download

BK7-RVNDF-25-3-E - Download

BK7-RVNDF-25-2-E - Download

BK7-RVNDF-25-1-E - Download

BK7-RVNDF-50-4-C - Download

BK7-RVNDF-50-3-C - Download

BK7-RVNDF-50-2-C - Download

BK7-RVNDF-50-1-C - Download

BK7-RVNDF-25-4-C - Download

BK7-RVNDF-25-3-C - Download

BK7-RVNDF-25-2-C - Download

BK7-RVNDF-25-1-C - Download

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Compare Model Drawings & Specs Availability Reference Price
(USD)

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