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info@adeptturnkey.com.au

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(08) 9242 5411

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(02) 9905 5551

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(03) 9384 1775

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MidOpt filters
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Neutral Density Filters


ND or Neutral Density filters uniformly weaken the intensity of light over a broad spectral range. This is achieved by either absorption using light absorbing glass or by a combination of absorption and reflection using a thin-film metal coating and are used to reduce luminous intensity without affecting colour. Different optical densities (OD) equate to an overall decrease in luminous transmission.

Absorptive ND filters for visible (400-700nm) applications
• ND090 – OD = 0.9 (T = 12.5%) – reduces light intensity • ND120 – OD = 1.2 (T = 6.3%) – for viewing into lamps


Low-Reflectivity ND Filters for Visible/Near-IR (350-1100nm) Applications
• NI090 – OD = 0.9 (12.5%) – reduces light intensity • NI120 – OD = 1.2 (6.3%) – for viewing into lamps, furnaces, welding processes, etc.

What is Optical Density?
OD or Optical Density is a measure of how much light is blocked by a filter.
Optical Density-OD = -log10 (T).
A filter with 1% transmission has an OD of 2


ND030 – Optical Density = 0.3 (T = 50%) – reduces light intensity
Model
Transmission
Suitable for
ND030
Passes 380nm and above
• Improving the separation of subject matter from the background by reducing the light that reaches the sensor so as to allow for longer exposure


Neutral density filters are used to reduce the amount of light reaching the sensor. This allows for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

ND030 single substrate filters (sometimes referred to as "2X" filters) (Optical Density = 0.30) absorb approximately 50% of visible light. These mounted filters include identical male and female threads on either end to facilitate stacking with other filters.

Note: Performance above 700nm varies significantly from lot to lot. For uniformity in near-infrared applications, careful selection of batch control is required. If you have special requirements, please contact Adept.



ND060 – OD = 0.6 (T = 25%) – reduces light intensity
Model
Transmission
Suitable for
ND060
Passes 389nm and above

• Applications where the separation of subject matter from the background is needed


Neutral density filters are used to reduce the amount of light reaching the sensor. This allows for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

ND060 single substrate - sometimes referred to as "4X" filters - (Optical Density = 0.60), transmit approximately 25% of visible light. These mounted filters include identical male and female threads on either end to facilitate stacking with other filters.

Note: Performance above 700nm varies significantly from lot to lot. For uniformity in near-infrared applications, careful selection of batch control is required. If you have special requirements, please contact Adept.

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ND090 – OD = 0.9 (T = 12.5%) – reduces light intensity
Model
Transmission
Suitable for
ND090
Passes 390nm and above
• Improving the separation of subject matter from the background by reducing the light that reaches the sensor so as to allow for longer exposure


Neutral density filters are used to reduce the amount of light reaching the sensor. This allows for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

ND090 single substrate filters - sometimes referred to as "8X" filters. - (Optical Density = 0.90), transmit approximately 12.5% of visible light. These mounted filters include identical male and female threads on either end to facilitate stacking with other filters.

Note: Performance above 700nm varies significantly from lot to lot. For uniformity in near-infrared applications, careful selection of batch control is required. If you have special requirements, please to contact Adept.

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ND120 – OD = 1.2 (T = 6.3%) – for viewing into lamps
Model
Transmission
Suitable for
ND120
Passes 395nm and above
• Improving the separation of subject matter from the background by reducing the light that reaches the sensor so as to allow for longer exposure


Neutral density filters are used to reduce the amount of light reaching the sensor. This allows for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

ND120 single substrate filters - sometimes referred to as "16X" filters - (Optical Density = 1.20), transmit approximately 6.25% of visible light. These mounted filters include identical male and female threads on either end to facilitate stacking with other filters.

Note: Performance above 700nm varies significantly from lot to lot. For uniformity in near-infrared applications, careful selection of batch control is required. If you have special requirements, please contact us.

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NI030 – Optical Density = 0.3 (T = 50%) – Low-Reflectivity, Neutral Density Filter for Visible and Near-IR Imaging - reduces light intensity
Model
Transmission
Features
NI030
Passes 395nm and above



• •
Improves the separation of subject matter from the background by reducing the amount of light reaching the sensor
Coated with reflection-inhibiting, vacuum-evaporated protective overcoat designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range
Uniform attenuation simultaneously over the entire visible and near-IR range with the actual percent transmission remaining constant
Low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock


NI030 filters are sometimes referred to as "2X" filters and include identical male and female threads on either end to facilitate stacking with other filters.

Neutral density filters are used to reduce the amount of light reaching the sensor, allowing for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

Unlike absorptive filter glass and non-reflective neutral density filters, low-reflectivity NI filters feature uniform attenuation simultaneously over the entire visible and near-IR range imaged by most industrial CCD/CMOS cameras, with the actual percent transmission (or optical density) remaining constant.

These filters also feature a reflection-inhibiting vacuum-evaporated protective overcoat that is designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range. Compared to absorptive neutral density filters, MidOpt's NI Filters use a low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock at no additional cost.

NI Filters are available off-the-shelf in standard threaded mounts, in thicknesses of 1, 2 and 3mm, and in custom shapes and sizes. Typical custom applications include reducing transmission from broadband light sources, low power laser attenuation and partial shrouding of inspection applications.

Back to Top

• NI060 – OD = 0.6 (25%) – Low-Reflectivity, Neutral Density Filter for Visible and Near-IR Imaging - reduces light intensity
Model
Transmission
Features
NI060
Passes 350nm and above



• •
Improves the separation of subject matter from the background by reducing the amount of light reaching the sensor
Coated with reflection-inhibiting, vacuum-evaporated protective overcoat designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range
Uniform attenuation simultaneously over the entire visible and near-IR range with the actual percent transmission remaining constant
Low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock


NI060 filters are sometimes referred to as "4X" filters and include identical male and female threads on either end to facilitate stacking with other filters.

Neutral density filters are used to reduce the amount of light reaching the sensor, allowing for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

Unlike absorptive filter glass and non-reflective neutral density filters, low-reflectivity NI filters feature uniform attenuation simultaneously over the entire visible and near-IR range imaged by most industrial CCD/CMOS cameras, with the actual percent transmission (or optical density) remaining constant.

These filters also feature a reflection-inhibiting vacuum-evaporated protective overcoat that is designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range. Compared to absorptive neutral density filters, MidOpt's NI Filters use a low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock at no additional cost.

NI Filters are available off-the-shelf in standard threaded mounts, in thicknesses of 1, 2 and 3mm, and in custom shapes and sizes. Typical custom applications include reducing transmission from broadband light sources, low power laser attenuation and partial shrouding of inspection applications.

Back to Top

• NI090 – OD = 0.9 (12.5%) – Low-Reflectivity Neutral Density Filter for Visible and Near-IR Imaging - reduces light intensity
Model
Transmission
Features
NI090
Passes 350nm and above



• •
Improves the separation of subject matter from the background by reducing the amount of light reaching the sensor
Coated with reflection-inhibiting, vacuum-evaporated protective overcoat designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range
Uniform attenuation simultaneously over the entire visible and near-IR range with the actual percent transmission remaining constant
Low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock


NI090 filters are sometimes referred to as "8X" filters and include identical male and female threads on either end to facilitate stacking with other filters.

Neutral density filters are used to reduce the amount of light reaching the sensor, allowing for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

Unlike absorptive filter glass and non-reflective neutral density filters, low-reflectivity NI filters feature uniform attenuation simultaneously over the entire visible and near-IR range imaged by most industrial CCD/CMOS cameras, with the actual percent transmission (or optical density) remaining constant.

These filters also feature a reflection-inhibiting vacuum-evaporated protective overcoat that is designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range. Compared to absorptive neutral density filters, MidOpt's NI Filters use a low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock at no additional cost.

NI Filters are available off-the-shelf in standard threaded mounts, in thicknesses of 1, 2 and 3mm, and in custom shapes and sizes. Typical custom applications include reducing transmission from broadband light sources, low power laser attenuation and partial shrouding of inspection applications.

Back to Top

• NI120 – OD = 0.9 (12.5%) – Low-Reflectivity Neutral Density Filter for Visible and Near-IR Imaging - for viewing into lamps, furnaces, welding processes, etc.
Model
Transmission
Features
NI120
Passes 350nm and above



• •
Improves the separation of subject matter from the background by reducing the amount of light reaching the sensor
Coated with reflection-inhibiting, vacuum-evaporated protective overcoat designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range
Uniform attenuation simultaneously over the entire visible and near-IR range with the actual percent transmission remaining constant
Low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock


NI090 filters are sometimes referred to as "16X" filters and include identical male and female threads on either end to facilitate stacking with other filters.

Neutral density filters are used to reduce the amount of light reaching the sensor, allowing for longer exposure times and reduced depth of field by using a wider iris opening, thus improving the separation of subject matter from the background.

Unlike absorptive filter glass and non-reflective neutral density filters, low-reflectivity NI filters feature uniform attenuation simultaneously over the entire visible and near-IR range imaged by most industrial CCD/CMOS cameras, with the actual percent transmission (or optical density) remaining constant.

These filters also feature a reflection-inhibiting vacuum-evaporated protective overcoat that is designed to reduce undesirable back reflections while maintaining uniform transmission over an extremely broad spectral range. Compared to absorptive neutral density filters, MidOpt's NI Filters use a low expansion glass substrate material to enhance durability and resistance to temperature extremes and thermal shock at no additional cost.

NI Filters are available off-the-shelf in standard threaded mounts, in thicknesses of 1, 2 and 3mm, and in custom shapes and sizes. Typical custom applications include reducing transmission from broadband light sources, low power laser attenuation and partial shrouding of inspection applications.

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