As a high-tech product that combines optical, mechanical, electronic, and software applications, the scanner is the third generation of computer input devices after the keyboard and mouse. Scanning guns have laser and axicon components. Before clarifying their differences, what is a barcode scanning module? The barcode scanning module is also called a barcode scanning module and a barcode scanning engine. It is a core identification component that is widely used in the field of automatic identification, and it is also one of the key components for secondary development of bar code scanners. The scanning module has complete and independent bar code scanning and decoding functions, which can be written into various industrial application function programs as required.
From the perspective of classification, the barcode scanning module can be divided into a one-dimensional code module and a two-dimensional code module, according to the light source can be divided into laser modules and a rainbow light module. The former believes that it will be easy for everyone to understand that one-dimensional code modules can only scan one-dimensional barcodes, and two-dimensional code modules can scan one-dimensional and two-dimensional barcodes. With regard to the laser scanning module and the acousto-optic scanning module, it may not be well understood by everyone. The following small series will focus on the explanation.
Pinbo SK2201 Long Distance Avision Barcode Scanner
The working principle of the laser scanning module is to generate a laser light source point by an internal laser device, hit a reflective sheet with a mechanical structure device, and then rely on a vibration motor to oscillate the laser beam into a beam of laser light and strike the barcode. AD is decoded into a digital signal. The rainbow scanning module is generally used LED light diode light source, rely on CCD photosensitive elements, and then through the photoelectric signal conversion.
Most of the laser scanning modules rely on glue to fix the machine to cause the mechanical device, so it is often easy to damage and swing off when it is swinging, so we can often see that some of the light sources scanned after the laser gun falls off become a point. , causing quite high repairs. There is no mechanical structure in the iris scanning module, so the resistance to drop is not comparable to the laser, so the stability is better, and the repair rate of the avision scanning module is much lower than that of the laser scanning module.
Pinbang SK2202 High Resolution Laser Barcode Scanner
From the point of view of the physical principles of laser and aurora, the laser refers to the energy of stimulated radiation and the light of good parallelism. Now most of the apices of light are emitted by the LED. The acupuncture is not what we call infrared. Physics defines it. The infrared light is an electromagnetic wave that spontaneously radiates from a temperature object and is not visible.
Infrared light includes all light having a wavelength greater than that of a rainbow light, and a laser light refers to a light having a certain wavelength. They have no inevitable contact and do not belong to the same field. The laser is the radiation generated by the stimulated emission of light. Infrared is the part of the spectrum where the naked eye can not observe the larger wavelengths. The wavelength is from 0.76 to 400 microns, depending on their wavelength and energy. The penetrability and anti-interference of light are worse than that of the laser, so the outdoor laser is better than the avionics under strong light.
What is the function of eyeshadow
1. Proper use of eye shadow can make your eyes more attractive, bigger and more beautiful, and make the whole makeup look three-dimensional and have the role of finishing touch.
2. In addition, when painting some special makeup, a large number of eye shadow will be used to highlight the look of the eyes. Usually, when making up in life, choose the color that you like and match with the color of Lipstick and clothing, touch a little eye shadow with your finger belly on the outer corner of the upper eyelid, and gently smear it from the outside to the inside. A simple wipe can make the whole person more colorful.
3. Eye shadow is a kind of color makeup, which is used to smear on the eye face (i.e. eyelid) and corner of the eye to produce shadow and tone contrast. Eye shadow is in powder, stick, paste, lotion, pencil and flake. The colors are very diverse, including blue, green, brown, tea, brown, and purple. Other colors are black, white, red, and yellow.
4. Eye shadow is a kind of cosmetics that can enhance the three-dimensional effect of the eye and modify the eye shape to set off the eye's radiance. It has rich colors and diverse varieties. Asian skin is yellow, and it is difficult to match eye shadow color. Therefore, we should follow the balance principle, balance the relationship between facial skin tone, hair color and eye color, and make us look radiant.
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