Lobre Products: Optical/
Polarising Filters
Optical filters (Waveplates), also available in polarised versions, are components specifically designed to selectively manage wavelengths. This permits the transmission or blocking of specific portions of the electromagnetic spectrum to enhance and manipulate image quality.
For 80 years, Lobre has provided fully custom design and manufacturing of optical components, working in close collaboration with clients in Italy and abroad.
Our optical engineers oversee the production and testing of each product, creating custom shapes, sizes and properties tailored to a wide range of application fields. Our optical filters are available in dichroic, absorptive, coloured, polarising, longpass, shortpass and more models. Upon request, they can also be designed for integration into modified optical windows.
Do not hesitate to contact Lobre to request the design and production of custom optical filters, engineered to meet your specific needs.
Custom Manufacturing of Optical Filters
We design and manufacture fully customised optical filters capable of blocking or transmitting specific light frequency ranges, ensuring high image quality and sensor protection.
Depending on the required level of precision, the filters are produced using thin-film dielectric coatings or specific absorptive materials, guaranteeing high frequency selectivity, environmental stability and long-lasting performance.
Our range of optical solutions includes, but is not limited to: dichroic filters, neutral density (ND) filters, calibrated spectral filters, polarising filters, absorptive filters, longpass filters, shortpass filters and waveplates.
Absorptive Filters (Glass Filters)
These filters block certain wavelengths through absorption. They are made from coloured glass or include absorptive layers. Ideal for general-purpose applications.
Dichroic Filters (Thin-Film Filters)
High-precision filters that exploit optical interference between dielectric layers to reflect or transmit specific spectral bands.
Neutral Density Filters (ND)
These filters reduce the intensity of incoming light without altering its spectral composition. Suitable for protecting sensors and avoiding overexposure.
Colour Filters (CF)
Glass filters designed for the selective absorption of specific spectral ranges. They enable optimal filtering of defined wavelength bands.
Bandpass Filters (BP)
Transmit only a narrow range of wavelengths.
Available in longpass (high-pass) and shortpass (low-pass) versions.
Filtri dicroici (DF)
Filters that transmit a narrow band of colours while reflecting other colours. These high-precision optical components are commonly used in microscopes and projection systems.
For Ultraviolet (UV)
– Quartz (Fused Silica UV Grade)
– Magnesium Fluoride (MgF₂)
– Calcium Fluoride (CaF₂)
For Visible Spectrum (VIS
– Extra-clear optical glass
– Borofloat
– N-BK7
For Infrared (IR)
– Germanium (Ge)
– Zinc Sulphide (ZnS)
– Calcium Fluoride (CaF₂)
– Magnesium Fluoride (MgF₂)
Materials for
optical filters
We manufacture optical filters using a wide selection of materials to achieve specific characteristics and produce components tailored to each customer’s requirements.
We can create custom coatings in-house, including with tailor-made recipes, ensuring excellent performance, maximum precision and versatility across countless application fields.
Contact our specialised technicians to request more information about the materials we can work with.
Application Fields
Space||Aerospace||Vision Systems||I.T.S.||Biomedical||Security||Laser||Lighting
Space and Aerospace
Optical filters for spectroscopy and space imaging are essential for satellites and probes, thanks to their high spectral selectivity.
Vision Systems
Filters enhance image contrast and isolate specific wavelengths to optimise visual data acquisition.
Speed Detection - I.T.S.
Optical bandpass and dichroic filters integrated into specialised cameras enable accurate speed detection.
Biomedical
The high spectral selectivity of optical filters makes them ideal for integration into microscopes and diagnostic devices.
Security
In surveillance and night vision systems, optical filters improve image quality by filtering selected spectral bands.
Laser
Laser and sensor filters protect components from high-energy beams and optimise emitted laser signals.
Lighting
Optical filters for industrial cameras and lighting systems are essential for modulating colour and intensity in LED devices and professional projectors.
The range of applications for optical filters spans from spectroscopy and biomedical technologies to industrial cameras and vision systems. Available in various configurations, materials and thicknesses, optical filters can be precisely tailored to meet specific application and spectral requirements.
Lobre designs and manufactures custom optical filters to spec, ensuring superior performance and compatibility with the most sophisticated optical systems.
We produce filters for visible light, UV and infrared, engineered to withstand the high optical and thermal demands of advanced industrial sectors.
Get in touch with us today from Italy or abroad to request the production of high-intensity light protection filters, optical filters for lenses and more.
