OptoSigma

Optics & Optical Coatings
Filters

There is a large choice of filters, their characteristics are thoroughly differentiated.
To choose the right filter characteristic may help you to increase your experimentation efficiency.

ND Filters

The transmittance can be fine tuned and offer the possibility of light intensity adjustment.
The metal coating reflection provide an extremly smooth transmission wavelength characteristic from the UV to the IR wavelength.

Absorptive Neutral Density Filter (Visible ・ Circle)

ND filter is a filter that reduces intensity of the visible light

Absorptive Neutral Density Filter (Visible ・ Mount type)

ND mounted filter is a filter that reduces intensity of the visible light

Absorptive Neutral Density Filter (Visible ・ Square)

ND filter of Square is a filter that reduces intensity of the visible light

Absorptive Neutral Density Filter (YAG Laser)

ND filter is a filter that reduces intensity of 1064nm YAG laser.

Reflective Neutral Density Filter (Visible)

This is the type of ND filter to reduce the transmittance by reflecting the incident light.

Reflective Neutral Density Filter (Ultraviolet)

It is a Reflective ND filter can also be used in the ultraviolet wavelength.

Reflective type of ND filter

The transmittance or the reflectivity varies by rotation.

Rotating variable reflective ND filter holder

Round shape variable reflective ND filter mounted with its holder.

Reflective Stepping type Variable ND Filter

Adjusting the transmitting light at an equal intervals of optical density.

Diffusers

Beam Shaping Diffuser

This is a high transmittance diffuser comparing to the other product, we can obtain a wide diffusion light at a single direction.

Ground Glass Diffusers (BK7 / Synthetic fused silica)

Ground glass diffuser has a large area diffusion of an incident light. It is widely used in prevention of imaging of lamp filament or to diffuse in...

Colored Glass Filters

Short Wave Cutoff Filters

Longpass filter that cut the short wavelength and let the long wavelength transmit.

IR Transmitting Filters

A filter that transmit IR wavelength and absorb the UV and Visible range.

UV Transmitting Filters

A filter that transmit a specific wavelength at the UV range and cut the visible range.

Blue and Green Filters

A filter that transmit a specific wavelength at the blue to green wavelength and cut-off the visible and other wavelength.

Heat Absorbing Filters

This is widely used in absorbing heat from halogen light and xenon light for experiments that need to avoid UV or heat from those lightings.

Color Temperature Conversion Filter

Use the LB filter for reducing the reddish light of the Tungsten lamp and use the LA filter for reducing the bluish of the LED lamp.

Color Correction Filter

The filter that can simulate the sensing of a human eye which is similar the silicon pixel detector sensor with a wavelength located at a peak at t...

Dielectric Filters

Visible range dichroic filters

The dielectric multi-layer coating offers a high optical performance result.

Visible range dichroic mirror

Mirrors of 3 fundamentals color RGB for use in color separation. No absorption effects because of the dielectric optical coating, the transmitting ...

Cold Filters

enables the visible range to transmit and cut off the IR range (heat).

Cold Mirrors

The principle of the cold mirror is reflecting the visible range light and leave the UV range light transmits.

Ultra-Violet Hot Mirrors

It is a dichroic mirror to transmit only visible light and to reflect ultraviolet and infrared.

Short Pass Filters

Divide sharply the color of wavelength by transmitting the short wavelength and cutting off the long wavelength.

Long Pass Filters

Divide sharply the color of wavelength by transmitting the long wavelength and cutting off the short wavelength.

Raman Long Pass Edge Filters

It is available to cut the excitation laser beam and extracted with high transmittance Raman shifted light on the longer wavelength side with a sha...

Sharp cut dichroic mirror

Divide sharply the color of wavelength by reflecting the short wavelength and transmitting the long wavelength.

Laser Line Filter

This filter can extract light in a specific wavelength range. Very high transmittance can be obtained in the transmission range.

Interference filters (Broadband type)

Filter that enable to extract a specific light from the wavelength, it enable to block the light of the IR band..

Interference filters (Narrowband type type)

Filter that enable to extract a specific light from the wavelength, it enable to block the light of the UV band.

Bandpass Interference filters (214.0nm - 647.1nm)

VPF can transmit a specified wavelength range at a spectrum width (half-width) as precise as 1nm to 40nm.

Bandpass Interference filters (650.0nm - 1550.0nm)

VPF can transmit a specified wavelength range at a spectrum width (half-width) as precise as 1nm to 40nm.

Bandpass Interference filters

VPF band pass filter with effective diameter at 45mm square or larger.

Notch Filter

Notch filter is a filter that cuts only a specific wavelength. It is not the same as the interference filter which transmits only a specific wavele...

Polymer Notch Filter

It is a polymer made notch filter that can be used for fluorescence microscopy, such as Raman spectroscopy.

Filter Case

Filter Case

Filter case for convenient storage of the filter.

Etalon

Etalon

Etalon is made of two parallel high reflecting mirrors and used as a narrow band filter.

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