Optogama, UAB (Lithuania): Optical equipment manufacturer
Please contact the import agency Taihei Boeki for details.
Optical filter
Optical Filters
Optical filters are optical elements used to control the intensity and wavelength characteristics of light, and they play a crucial role in lasers and various optical systems.
Depending on the application, different types of filters are used, such as attenuation, selection, and variable filters.
Depending on the application, different types of filters are used, such as attenuation, selection, and variable filters.
Absorption ND filters have flat transmission characteristics over a wide wavelength range and are suitable for applications that uniformly attenuate light intensity. Bandpass filters selectively transmit only specific wavelengths using multilayer interference films, removing unwanted spectral components. Variable ND filters allow for continuous adjustment of transmittance, making them suitable for experimental and laser power adjustment applications.
These filters cover a wide range of regions, from UV to near-infrared, and are used in various applications such as measurement, spectroscopy, and laser control. It is important to select the optimal filter type according to the application and required characteristics.
Product Selection
When selecting an optical filter, the criteria should be either controlling the light intensity or selecting the wavelength.
If you want to attenuate light intensity to a constant level, an absorption-type ND filter is suitable. If you want to transmit only specific wavelengths, use a bandpass filter. If you want to continuously adjust the transmittance, a variable ND filter is effective.
Depending on the application, you can select the optimal filter from the available attenuation, selection, and variable functions.
Product | Steps to follow | Main features | Main uses |
|---|---|---|---|
| Absorption type ND filter | Fixed | Flat transmission and stable attenuation | Laser attenuation and detector protection |
| Bandpass filter | Fixed | Narrowband transmission and high selectivity | Wavelength-selective and spectroscopic measurements |
| Variable ND filter | variable | Continuously variable, easy adjustment | Output adjustment and experimental condition setting |
Selection criteria
- To attenuate light intensity by a certain percentage → Absorption type ND filter
- To selectively transmit only specific wavelengths → Bandpass filter
- To continuously adjust light intensity → Variable ND filter
Technical supplement
Optical filters are optical elements that control the intensity and wavelength characteristics of light, performing functions such as light attenuation, selection of specific wavelengths, and removal of unwanted spectral components. They are constructed based on different principles, such as absorbing materials, dielectric multilayer films, or variable structures, and each has different properties.
When selecting a laser, comprehensive optimization is crucial, taking into account the wavelength range, transmission and attenuation characteristics, required wavelength selectivity, and the application in the optical system (intensity control, wavelength selection, and variability adjustment). Furthermore, for high-power laser applications, the damage threshold must be considered, while for spectroscopic applications, the transmission bandwidth and cutoff characteristics must also be taken into account.
Product List (Optical Filters)
| Absorption type ND filter Neutral density (absorption) filters This filter uniformly attenuates light intensity while suppressing wavelength dependence, making it suitable for applications such as adjusting laser output and protecting detectors. |
| Bandpass filter Bandpass (interference) filters Interference filters selectively transmit only specific wavelengths, removing unwanted spectral components and are used for spectroscopic measurements and wavelength selection applications. |
| Variable ND filter Circular variable neutral density filters This filter allows for continuous adjustment of transmittance, enabling stepwise control of light intensity through rotation, making it suitable for experiments and laser power adjustment. |
