dichroic filter: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “dichroic filter” mean?
A specialized optical device that transmits light within a specific wavelength range while reflecting all other wavelengths.
Audio
Pronunciation
Definition
Meaning and Definition
A specialized optical device that transmits light within a specific wavelength range while reflecting all other wavelengths.
Any engineered surface, coating, or material used to precisely separate light by wavelength for scientific, industrial, or artistic purposes.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or semantic differences. Both dialects use the same term with identical technical meaning.
Connotations
None beyond its technical definition.
Frequency
Equally rare in general language but standard in relevant technical fields in both regions.
Grammar
How to Use “dichroic filter” in a Sentence
The [INSTRUMENT] uses a dichroic filter to [FUNCTION].A dichroic filter [VERB OF SEPARATION] [WAVELENGTH RANGE] from [OTHER LIGHT].Vocabulary
Collocations
Examples
Examples of “dichroic filter” in a Sentence
adjective
British English
- The dichroic coating on the mirror was manufactured in Germany.
- We need dichroic glass for the art installation.
American English
- The dichroic coating on the mirror was manufactured in Germany.
- We need dichroic glass for the art installation.
Usage
Meaning in Context
Business
Rare, except in procurement or sales for scientific/optical equipment.
Academic
Common in physics, engineering, and materials science papers and lectures.
Everyday
Virtually never used.
Technical
The primary context. Used in manuals, specifications, and discussions related to optics, microscopy, spectroscopy, stage lighting, and photography.
Vocabulary
Synonyms of “dichroic filter”
Strong
Neutral
Weak
Vocabulary
Antonyms of “dichroic filter”
Watch out
Common Mistakes When Using “dichroic filter”
- Confusing it with a simple coloured gel or absorptive filter. Dichroic filters work via interference, not absorption.
- Pronouncing it as 'di-KRO-ik' instead of 'dye-KROH-ik'.
FAQ
Frequently Asked Questions
No. Coloured glass filters work by absorbing unwanted light. Dichroic filters use thin-film interference to reflect unwanted wavelengths, making them more efficient and heat-resistant.
The term comes from Greek 'di-' (two) and 'chrōma' (colour), historically referring to materials showing two different colours by transmitted and reflected light. Modern filters are named for this colour-separating function.
In high-quality stage or architectural lighting (to create pure colours), in some anti-counterfeiting security strips on banknotes, or in the beam-splitting optics inside a digital projector or modern microscope.
Yes. A 'dichroic mirror' is a type of dichroic filter designed to reflect a specific colour band very efficiently while transmitting others. It is a mirror for selected colours only.
A specialized optical device that transmits light within a specific wavelength range while reflecting all other wavelengths.
Dichroic filter is usually technical/scientific in register.
Dichroic filter: in British English it is pronounced /daɪˈkrəʊ.ɪk ˈfɪl.tə(r)/, and in American English it is pronounced /daɪˈkroʊ.ɪk ˈfɪl.tɚ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is purely technical and does not feature in idiomatic expressions.”
Learning
Memory Aids
Mnemonic
Think: 'DIvide CHROmatic' → 'dichroic'. It divides colour (light) by selectively filtering it.
Conceptual Metaphor
A TRAFFIC COP FOR LIGHT, directing specific colours one way and others another way.
Practice
Quiz
What is the primary operating principle of a dichroic filter?