Square Optical Filters
Description
Square optical filters are devices designed to selectively transmit or block specific wavelengths of light. They are typically used to control the spectral properties of light, allowing only certain wavelengths to pass through while blocking others. These filters are characterized by their square shape, which can be advantageous in certain optical setups.
Working Principle
Square optical filters operate based on principles such as interference, absorption, and transmission. They can be designed to either absorb unwanted wavelengths while allowing desired ones to pass through or to reflect certain wavelengths while transmitting others. The effectiveness of these filters is often measured by metrics such as transmittance, stopband, and bandwidth, which define how well the filter performs in terms of allowing or blocking specific wavelengths .
Applications
Square optical filters are used in a variety of applications. They are essential in fluorescence microscopy, where they help in isolating specific fluorescence signals from background light . Additionally, they are used in Raman spectroscopy and laser filtering, where precise control over wavelength transmission is crucial .
Advantages over other Optical Filters
Square optical filters offer specific advantages in applications requiring precise wavelength control. For example, in fluorescence microscopy, they provide high precision in isolating specific wavelengths, which is critical for accurate imaging . Their shape can also be beneficial in certain optical setups where space constraints or alignment precision is a concern.
Limitations
One of the limitations of square optical filters is their increased angle sensitivity, which can affect their performance in certain applications. They may also be less effective at blocking wide wavelength ranges compared to other types of filters .
Considerations
When considering square optical filters, it is important to evaluate factors such as initial costs, which can be high due to the precision manufacturing required. Operating expenses may include maintenance and replacement costs, especially if the filters are used in environments where they are exposed to harsh conditions. Durability and accuracy are also critical factors, as these filters need to maintain their performance over time to ensure reliable results in their applications.
from Newport MKS
The M-PPF50 Spring-Loaded Filter mount supports 2.0 in. (50.8 mm) square filters with a thickness of up to 5 mm. Two steel springs hold the filter on a frame with a 1.57 in. (40 mm) clear aperture. Two M-PPF50 filter holders can be screwed to one another to form a unit that holds two filters. This... [See More]
- Filter Shape: Square
from Electro Optical Components, Inc.
The capabilities of anti-reflection coatings for infrared optical interference filters range from single layers to advanced high efficiency multi-layer coatings. These coatings can be applied to windows, lenses or customer supplied substrates. For special applications, the coatings can be designed... [See More]
- Filter Shape: Circular; Square; Rectangular
- Filter Diameter, Side Length, or Rectangular Length: 7.5 to 100
- Application: Infrared
- Rectangular Width: 3.3 to 50
from CeNing Optics Co., Ltd.
Band pass filter plates are divided into short-pass and long-pass filters according to whether they transmit below or above the transition wavelength. The transition wavelength or cut-on/off wavelength is the wavelength at which the transmission is 50% of its peak value. [See More]
- Filter Shape: Circular; Square
- Application: Infrared; Visible
- Filter Type: Bandpass / Interference Filters; Long Pass Filters; Short Pass Filters
- Filter Diameter, Side Length, or Rectangular Length: 5 to 76.2
from CeNing Optics Co., Ltd.
CeNing Optics provide a variety of colored glass filters covering the UV, visible and near-infrared wavelength regions. These filters serve as bandpass, broadband, or long-wave pass filters. [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Infrared; Visible; Ultraviolet
- Filter Type: Color Filters; Bandpass / Interference Filters; Broadband, Long-wave
- Filter Diameter, Side Length, or Rectangular Length: 5 to 76.2
from Edmund Optics Inc.
Ideal for Reducing Heat In Projectors. Reflects 90% of the NIR and IR. Transmits 80% of Visible Light. These 0 ° and 45 ° angle of incidence Hot Mirrors are perfect for decreasing the undesirable heat caused by infrared radiation. A multi-layer dielectric coating transmits 80% of visible... [See More]
- Filter Shape: Square
- Filter Diameter, Side Length, or Rectangular Length: 12.5
- Filter Type: Hot Mirrors
- Thickness: 1.1
from Thorlabs, Inc.
At Thorlabs, we constantly reinforce our desire to serve at the pleasure of our customers. From this comes our desire to be connected to our industry in a way that far exceeds what would typically be expected of a vendor. Thorlabs lives this core principle by seeking to enhance, at every turn, the... [See More]
- Filter Shape: Circular; Square
- Application: Infrared; Visible; Ultraviolet
- Filter Type: Color Filters
- Filter Diameter, Side Length, or Rectangular Length: 25
from Rainbow Research Optics, Inc.
Rainbow Research Optics, Inc. (RROI) specializes in custom optics. We focus on wavelength ranges from 193 nm to 14 um. Our manufacturing capabilities include a wide range of optical components including lenses, mirrors, windows, prisms, beamsplitters, filters, coatings, and more. While we offer a... [See More]
- Filter Shape: Circular; Square
- Surface Quality: 20-10 Scratch / Dig
- Filter Type: Color Filters; Bandpass / Interference Filters; Long Pass Filters; Short Pass Filters; Neutral Density Filters
from Jiangyin Deli Laser Solutions Co., Ltd.
Sapphire/ruby windows are applied as circuit substrates, epitaxial substrates, oriented substrates to GaN, GaAs. And other, sapphire possesses nice light transmission in0.20~5.50um wave band, and the infrared ray transmission is hardly influenced by temperature, so the optical components made of... [See More]
- Filter Shape: Square
- Application: Infrared
- Filter Type: Spectral Filters
- Transmission Range: 200 to 5500
from Qioptiq
For incidence angles of 45 °. Transmittance of IR light and reflection of visible light. High reflection in the visible range. No absorption of dielectric coating. Heat-resistant up to 300 °C. Thickness 1.1 mm. R ≥ 97 % for 425 - 600 nm. T = 50 % for 685 ± 15 nm. T ≥ 80 % for... [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Infrared
- Filter Type: Cold Mirrors
- Filter Diameter, Side Length, or Rectangular Length: 25 to 160
from Rapid Spectral Solutions
Neutral density filters available in a wide range of optical densities and sizes. These filters are suitable for all general use. [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Infrared; Visible; Ultraviolet
- Filter Type: Neutral Density Filters
- Filter Diameter, Side Length, or Rectangular Length: 6.25 to 100
from EKSMA OPTICS
EKSMA OPTICS neutral density (ND) filters attenuate VIS spectral region. The optical density varies from 0.1 to 3.0, 1 or 2 inches size square and roud shapes are available. Neutral density absorption type filters decrease the intensity of light without altering the relative spectral distribution of... [See More]
- Filter Shape: Circular; Square
- Application: Visible
- Filter Type: Neutral Density Filters
- Filter Diameter, Side Length, or Rectangular Length: 25.4 to 50.8
from Abrisa Technologies
Abrisa Technologies designs, manufactures and distributes precision optical coating solutions and custom glass fabricated optical products via our two divisions Abrisa Industrial Glass, located in Santa Paula, CA and ZC &R Coatings for Optics located in Torrance, CA. Our innovative engineering... [See More]
- Filter Shape: Circular; Square
- Filter Diameter, Side Length, or Rectangular Length: 610
- Filter Type: Color Filters; Dichroic Filters
- Thickness: 1.1 to 3.3
from Qioptiq
Absorption free interference systems. Nearly no-loss, diversion or mixture of basic Colors blue, green and red. For angles of incidence of 45 °. Heat-resistant up to approx. 300 °C. Thickness of all filters: 1.1 mm. Special sizes up to 160 mm x 110 mm on request. [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Visible
- Filter Type: Color Filters
- Filter Diameter, Side Length, or Rectangular Length: 25 to 160
from Rapid Spectral Solutions
Rapid Spectral Solutions (RSS) has a listing of many bandpass filters with FWHM of 1.0 to 50 nm, with a feature of accepting light from a substantial field of view. Filters can be provided with Acceptance Angles up to +- 50 degrees from normal with little loss of normal performance. Getting them in... [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Infrared; Visible
- Filter Type: Bandpass / Interference Filters; Fused Silica Encapsulated
- Filter Diameter, Side Length, or Rectangular Length: 6.25 to 100
from Rapid Spectral Solutions
Rapid Spectral Solutions (RSS) has a listing of many atomic and laser emission line filters with FWHM of less than 1.0 nm. Getting them in your hands in days to weeks rather than months, for the lowest possible cost, is a challenge we thrive on. [See More]
- Filter Shape: Circular; Square; Rectangular
- Application: Infrared; Visible
- Filter Type: Bandpass / Interference Filters; Fused Silica Encapsulated
- Filter Diameter, Side Length, or Rectangular Length: 6.25 to 100