Optical and Ultrasonic Fingerprint Sensor! First, we start with an Optical fingerprint scanner. This type of scanner has a source light, which emits laser light to a prism. The prism is positioned at such an angle to this light that, as a result of 100% internal reflection, the light emitted from the source touches one side of the prism and reflects back.
This reflected light is then captured by a sensor. This captured light is then converted into a digital image and used for validation. When you place your finger on the sensor, you block the total internal reflection from the source, thereby helping the sensor take a high-resolution picture of your finger
What are the advantages and disadvantages of an optical scanner
The main benefit of optical scanners—and the reason they are so popular—is that they can be less expensive to use and develop.
Optical scanners have additional problems, the major one being that they are more susceptible to fraud, making your phone less secure than if you were using an ultrasonic scanner. These scanners could be tricked by using a high-resolution image of a fingerprint, and if your finger is oily or dirty, that will prevent the light from accurately capturing your fingerprint
The ultrasonic fingerprint sensor is more Secure than the Optical sensor and is better at detecting the details even through dirt and sweat.
It recognizes patterns from the highs and lows of your finger. Each finger has a unique pattern of fingerprints. Now how it does this in-depth depends on which type of fingerprint scanner the device uses. There are 3 basic types of fingerprint scanners This is the most demanding of all.
Ultrasonic fingerprint scanner: These sensors emit ultrasonic waves from a source that can travel through glass, metal, etc. but get reflected by your finger. These reflected waves are captured back by its receiver and a 3D model of your fingerprint is created for validation.
Have you ever questioned which fingerprint scanner on your phone is the most reliable? To help you decide which technology is best, we’ll lay down all the distinctions between the optical and ultrasonic scanners
One of the finest methods for quickly accessing your phone is a fingerprint scanner. Along with Face ID and the now much less popular physical fingerprint scanner, it’s a simple way to keep your phone private and secure without having to enter a password each time.
A three-dimensional image is produced by an ultrasonic fingerprint sensor by reflecting a sound pulse wave off your fingers. Compared to optical in-display sensors, it is far more secure and is usable with oily, grimy, or damp fingertips.
But did you know that many of the greatest Android phones feature a variety of fingerprint scanners? We’ll discuss both optical and ultrasonic scanners so you can understand their pros and limitations as well as which technology is superior.
- Fast identified online.
- Alliance protocols can be used.
- Online passwordless authentication.
- You’d be able to log into certain apps or websites by simply using your fingerprint scanner and not having to type in your password.
- This a very geeky but very existing it
What are the advantages and disadvantages of ultrasonic fingerprint scanners?
You don’t need to be accurate when using an ultrasonic scanner to scan your finger, and it will function even if your hand is oily or dirty, as well as in cold temperatures and direct sunshine, which the optical alternative has trouble with (but we’ll cover that later.
Additionally, it is considerably more difficult for someone to use a 2D duplicate of your fingerprint to access your phone because every ridge and distinctive aspect of your finger is brought mapped in 3D.
There are some disadvantages, though, as with everything. Some claim that you should be cautious while selecting screen protectors because there cannot be any air gaps between the screen protector and the actual screen for the scanner to work.
Which is best
Although each fingerprinting method has advantages and disadvantages, it is obvious that ultrasonic scanners are the better technology overall. Now we know about Optical and ultrasonic fingerprint scanners!