Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters (coloured shades F21V1/00; elements characterised by cooling arrangements F21V29/502)

Child Classifications

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• F21V 9/02 for simulating daylight (F21V9/04, F21V9/06 take precedence)
• F21V 9/04 for filtering out infrared radiation (dichroic reflectors F21V7/22; using liquid-filled chambers F21V9/12)
• F21V 9/06 for filtering out ultraviolet radiation
• F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40)
• F21V 9/14 for producing polarised light
• F21V 9/20 Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
• F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40)
• F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity