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PRINZ OPTICS GmbH

Simmerner Strasse 7
D-55442 Stromberg

T   + 49 67 24 - 60 19 30
F   + 49 67 24 - 60 19 311

M   infoatprinzoptics [dot] de

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Prinz optics Glossar - dichroitische und optische Filter aus Glas

Technical terms

One of our core competencies and the term  that is looked up the most:

Dichroic glass / Dichroic filter

Interference-coated glass with light transmission for certain wavelength ranges (one specific colour) and reflection of the remaining ranges, i.e. they are not converted into heat through absorption.


The colour effect of dichroic filter layers varies with the wave angle and the viewing angle of the observer.

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Further special terms:

Achromatic beam splitter

Colour-neutral, partially transparent mirror with reflection of a certain percentage of light and transmittance of the rest.

Anti-reflective coating

Interference system for reducing the reflection on glass surfaces.

AR coating

"Anti-reflective coating": Interference system for reducing the reflection on glass surfaces. The remaining reflection level at each glass surface is less than 1%

Argon/Krypton

Inert gas for the enhancement of heat insulation for insulation glass.

Borofloat

Colour-neutral Borosilicate glass with high temperature and chemical stability produced using a floating process.

Chemical strengthening

Enhancement of the mechanical and thermal strength of the glass through special salt bath treatment.

Clear glass

Float glass with low iron oxide content to avoid the "green tint" of the glass.

Cold light mirror

Dichroic mirror which reflects the visible part of the light but lets heat radiation pass.

Conversion filter

Colour filter which can be used to modify the colour temperature of the light towards blue (colder) or red (warmer) or to carry out colour corrections. Is, e.g., used for product lighting.

Colour effect filter

See Dichroic filter

Development

Calculation of coating systems, sample production of coating solutions and systems in the laboratory with the goal of meeting new customer-specific requirements (order development).

Dip coating

Sol-gel coating method where the substrate is drawn out of the coating solution under constant conditions. Due to the effect of the air humidity, the sol becomes a gel, which is then transformed into a metal oxide via a tempering process.

EVA

Ethylene-vinyl acetate plastic: Intermediate layer in laminated safety glass.

FE types

Category of colour effect filters with medium colour saturation.

Float glass

High-quality, transparent flat glass manufactured using the so-called "floating process".

FM types

Category of colour effect filters with low colour saturation.

FS types

Category of colour effect filters with high colour saturation.

Half mirror

Colour-neutral, adsorption-free, partially transparent mirrors with reflection of a certain percentage of light and transmittance of the rest.

Heat reflection filter

Dichroic mirror, which reflects the IR part of the light but lets the visible radiation pass.

Heat strengthened glass

Partially toughened glass: Toughened flat glass with enhanced impact and bending strength. The breakage structure is similar to float glass.

Insulating glass

Item made of at least two glass panels. The distance between the glass panels is ensured via spacers.

Heat insulating glass

Insulating glass with improved heat insulation characteristics through the application of low e-coatings and inert gases.

Sound insulating glass

Insulating glass consisting of two or more glass panels with expediently coordinated thicknesses and distances, filled with air or special gas mixes.

Interference

Interaction of two light beams, where - depending on the relation between them - amplification or annihilation occurs.

Interference principle, interference layer technology

Transparent thin layers with certain thickness and optical features are applied in a special sequence on a glass substrate. The reflected light fractions of the individual layers interfere with each other which leads to amplification or reduction of certain wavelength ranges - depending on the layer system design.

IR mirror

Dichroic mirror, which reflects the IR part of the light but lets the visible radiation pass.

IR radiation

Infrared radiation (thermal radiation): invisible radiation that heats up absorbing materials.

Laminated safety glass

Laminated safety glass consists of at least two flat panels, which are laminated together with a PVB intermediate layer.

"Mosaic" assembling

Limited sizes of panels can be bonded on a glass plate truss through a special bonding process, thus achieving greater dimensions. Additionally, this technique enables the design of mosaics in different colours and sizes.

PVB

Polyvinyl butyral: Synthetic intermediate layer in laminated safety glass.

SentryGlas® Dupont

Synthetic intermediate layer in laminated safety glass.

Sol-gel dip coating

Method for producing thin layers on glass substrates. The glass is dipped into different solutions of organic metal compounds and drawn out at a defined speed. The film on the glass surface is transformed into adhesive metal oxide layers in the subsequent thermal process. By varying the materials, the number of layers and the layer thickness (depending on the drawing speed), it is possible to adjust the optical effects of the layer systems.

Step insulating glass

Insulation glass unit, which shows an excess length of the panels. Especially used for bevelled and overhead conveyor glazing.

Structural glazing

Static effective adhesion of glass on a metal frame construction.

Sun simulation filter

Optical filter that, when combined with a suitable light source, simulates the solar spectrum to the best possible degree. Application: for electrical characterisation of photocells and material testing.

Tempered or toughened glass

Thermal tempered glass whose impact and bending strength is enhanced through a strengthening process. Tempered glass will shatter into blunt-edged pieces in case of destruction.

Thermal tempering

Enhancement of the mechanical and thermal strength of the glass through thermal treatment (heating up, followed by fast, defined cooling down).

U-value

Heat transfer coefficient: Measuring unit for the heat lost through the glazing. Is specified in W/sqm K.

UV filter

It is differentiated between UV absorbing and UV reflecting filters.

UV filter edge

Characteristic wavelength for the crossover from the exclusion range (ultraviolet) to the transmission range (longer wavelength) of the filter where the transmission is 50%.

UV, VIS and NIR range

Ultra Violet range: 200-380 nm; VISible range VIS: 380-780 nm; Near (short wave) InfraRed NIR: 780-3000 nm.

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Address

PRINZ OPTICS GmbH

Simmerner Strasse 7
D-55442 Stromberg

T   + 49 67 24 - 60 19 30
F   + 49 67 24 - 60 19 311

M   infoatprinzoptics [dot] de

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