Reference

What are "Dichroic Filters" ?

Dichroic Filters are multi-layer thin-films that are coated on a glass substrate through the thermal evaporation and the high vacuum deposition technology.

The Dichroic Filter allows the light to transit on a specified wavelength and reflects the other light unnecessary. Since the Dichroic Filter absorbs no energy, it has a higher rate of light transmission. The Dichroic Filters has a wide application on architecture, arts and other technological usages because of its better resistance and performance.

Why are Dichroic Filters better than Gel Filters ?

◎	Dichroic Filters transmit the light on a specified wavelength
	only and reflect the unnecessary light. However, Gel Filters
	are easy to absorb the unwanted light which results in a
	deteriorated performance.

◎	The Dcirhoic Filter has a higher rate of light transmission than
	Gel Filters do. The average of light transmission of Dichroic
	Filters is usually in the range of 90% while Gel Filters can be
	at 50% to 60% or even less.

◎	The Dcichroic Filter has a stronger heat resistance than Gel
	filters. The Dchroic Filter will not melt, shrink or fade.

◎	The Dhiroic Filter requires low maintenance and is not
	necessary to be replaced frequently. It has longer life
	expectancy.

◎	The Dcihroic Filter appears purer and more saturated colors
	It gives more dramatic effects than Gel Filters.

Installation

In order to have the excellent performance, it is better to install the coated side of the filter towards the light source. Viewing the edge of filter will help to determine which side of the glass is coated. The filter must be installed at the angle of 90 degrees to the light path to avoid the color shift caused by improper installation. Besides, the filter is not suggested to apply to the fixtures with an angle greater than 40 degrees. Otherwise, you cannot get the best color performance.

	Coated Side	Un-coated Side

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