What is a Bandpass Optical Filter?
In a certain band, there is only a small band with high transmittance in the middle and a high reflectivity cut-off band on both sides of the band. This kind of optical filter is collectively called b...
The Introduction of Bandpass Filter
A bandpass filter is a filter that can pass the frequency component within a certain frequency range but attenuate the frequency component of the other range to a very low level. An example of analog ...
The Use of Filter in the Counterfeit Detector
The currency detector is an optoelectronic instrument for checking the authenticity of banknotes, involving many fields such as machinery, electricity, light, and magnetism. The counterfeit identifica...
Different Types of Filters
Small and tiny though a filter is, it plays a vital role. As a part of the optical industry, filters play a key role. So what kinds of filters are there according to the spectral characteristics?1. Lo...
SWIR Lens
1. Introduction of SWIR lensesLight is a kind of electromagnetic wave, with the visible spectral of 0.38-0.76um, and the infrared spectral region of 0.76-1000um.The part of 0.76-3.0um is called refle...
The Basics of Bandpass Filters
Bandpass filters are used to transmit the required wavelength range and cut off the unwanted wavelength range. Their design is essentially a thin film formed by vacuum deposition technology, which con...
Basic Concepts and Parameters of Optical Filters
1. The basic concept of optical filterAn optical filter is simply an optical device used to selectively filter the required radiation band. The substrates are mostly optical materials such as white gl...
Classifications of Filters
Although there are many types of filters, they all have the same basic function: transmit light of a specific wavelength or color range while preventing the remaining wavelengths from passing through....
Basic Knowledge About SWIR Lensens
1. SWIR Lenses is also an optical lensSWIR Lenses refers to the wavelength range between 900nm and 2500nm, which is invisible to the naked eye.Light is an electromagnetic wave. SWIR lenses is located...
Tips on Selecting The Bandpass Filter
1. What is Bandpass Filter?Bandpass Filter is optical filter that passes one or more specified wavelength bands while blocking other wavelength bands. Bandpass Filter refers to wavelength ranges and i...
What Are the Effects of Fisheye Lens?
Ⅰ. What are fisheye lenses?A fisheye lens is a type of super wide-angle lens that aims to view as far as the human eye can perceive, if not farther. However, there is a significant difference, becaus...
What Are the Uses of Sapphire Lenses?
Sapphire lenses are excellent optical lenses with good transmittance in ultraviolet, infrared, and visible light bands. They can meet the requirements of multi-mode composite guidance. Sapphire filter...
The Role of Fisheye Lenses
Fisheye camera lens is a type of lens with a very short focal length and a viewing angle close to or equal to 180°. It has a focal length of 16mm or shorter. It is an extremely wide-angle lens and is...