optical color filter for high pass optical filter

Flat-convex silicon lens

Polished filter:
Filters are available as polished plates or round discs with processed edges. Upon request, they are available thermally strengthened and/ or with protective/ antireflective coating
Filter glass prepared:
- With processessed edges
Rectangular plates and round discs with matt surfaces and processed edges - Edges not processed
Rectangular plates and round discs with matt surfaces and edges not processed.
Standard formats with non-processed edges:
Plate sizes 165 x 165 + 3-0 mm
Plate thickness 3.5 mm +/- 0.5 mm and 4.5 mm +/- 0.5 mm

HENGXIANG optical factory produces a wide variety of Optical Components, including Silicon lenses, Germainium lens, IR filters, or windows.
Optical low pass filterS are ideal for collimation or focusing applications called spent monochromatic light. Each filter are available in a range of sizes or focal lengths for a wide variety of application needs.

UG Black and blue glass which permits the transmission of UV light
BG Blue, blue-green and bandglass
VG Green glass
GG Yellow glass which permits IR light transmission
OG Orange glass which permits IR light transmission
RG Red and black glass which permits IR light transmission
NG Neutral glass with virtually constant radiation weakening in the visible range
N-WG Colourless glass with different cut-off positions in the UV range and which allows IR and visible light transmission
KG Virtually colourless glass with high transmission of visible light and absorption of radiation in the IR range
FG Blue and brown coloured glass (conversion glass)

A band-pass filter (also spelled bandpass) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

Optical band-pass filters are common in photography and theatre lighting work. These filters take the form of a transparent coloured film or sheet.

Applications

Bandpass filters are widely used in wireless transmitters and receivers. The main function of such a filter in a transmitter is to limit the bandwidth of the output signal to the band allocated for the transmission. This prevents the transmitter from interfering with other stations. In a receiver, a bandpass filter allows signals within a selected range of frequencies to be heard or decoded, while preventing signals at unwanted frequencies from getting through. A bandpass filter also optimizes the signal-to-noise ratio and sensitivity of a receiver.

In both transmitting and receiving applications, well-designed bandpass filters, having the optimum bandwidth for the mode and speed of communication being used, maximize the number of signal transmitters that can exist in a system, while minimizing the interference or competition among signals.

Outside of electronics and signal processing, one example of the use of band-pass filters is in the atmospheric sciences. It is common to band-pass filter recent meteorological data with a period range of, for example, 3 to 10 days, so that only cyclones remain as fluctuations in the data fields.

In neuroscience, visual cortical simple cells were first shown by David Hubel and Torsten Wiesel to have response properties that resemble Gabor filters, which are band-pass.^[3]

In astronomy, band-pass filters are used to allow only a single portion of the light spectrum into an instrument. Band-pass filters can help with finding where stars lie on the main sequence, identifying redshifts, and many other applications.

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