How to focus the laser pointer and how to use the laser pointer

Twelve: Adjust the focus to find the focus.

Adjustable flashlight, by adjusting the laser focus, to achieve the best thermal effect.

The light of the laser, adjusted by the lens of the flashlight head, will form a focus at a certain position in the head of the flashlight.

Generally, the focus range of the laser is within 1 meter outside the light outlet.

The optimal focus position is adjusted to the range of 10-20 cm of the light outlet, that is, the thermal efficiency of the laser is the strongest at the focal point formed in this range.

How to find the focus of the laser through adjustment is very important for players who like to play something.

Let's briefly talk about one.

Start to contact the laser pointer, you can press and hold the laser switch with one hand in a slightly dark place, light the laser, and then adjust the focus ring with the other hand, slowly adjust it slightly, while adjusting, while observing the light within 20 cm from the flashlight port, you will find that the light changes slightly with the adjustment, and is the smallest compared to a certain point, then this point is the focus of this position.

As you adjust, you will find that the thinnest point is moving slowly, that is, the focus of the laser is moving as you adjust.

In general, the heat efficiency of the focal point is greatest within 10-40 cm from the flashlight port.

If you don't feel the light obviously, you can take a puff of cigarette on the laser light, and you will obviously see the thinnest light at a certain point, that is, the focus of the laser at this distance.

It is also possible to make the laser spot hit an object, such as a keyboard, or a match. The best distance is about 10-20 cm.

Then, while adjusting the focus circle, observe the size of the laser spot hitting the object. As adjusted, the laser spot will change from large to small, or from small to large.

The smallest spot of laser light that is observed to hit the object is the focal point of the laser at this distance.

It should be noted that do not adjust the focus too close to the flashlight, such as within 5 cm, so that if you point to the object closely, the smoke emitted by the object may make the lens dirty. Generally, the focus position is best in the range of 10 cm to 20 cm, and this position points the object, and the smoke and dust will not affect the lens.

From: Nuoqing Laser**.

At present, the common ones are gathered through convex lenses.

Summary. The laser pointer is very simple to use, first turn on the power switch, then point the laser pointer at the target object or projection screen, and gently press the switch to launch the laser. Remember not to shine directly on human eyes or animals to avoid injury.

For the specific use method and special functions, there are slight differences between different models of laser pointers, it is recommended to follow the product manual or contact the seller for more information. Hope the above helps!

The laser pointer is very simple to use, first turn on the power switch, then point the laser pointer at the target object or projection screen, and gently press the switch to emit the laser. Remember not to shine directly on human eyes or animals to avoid injury. For the specific use of the acorn-source method and special functions, there are slight differences between different models of laser pointers, it is recommended to follow the product manual or contact the seller for more information.

Hope the above helps!

You've done a great job! Can you elaborate on that?

Using a laser pointer is very simple, first turn on the switch, aim at the target object or screen, and press the off to shoot the laser. Avoid direct exposure to eyes or animals, please refer to the product manual or consult the seller for more information. Hope you find it helpful!

Hello, how to use laser pointer Laser pointer is a common electronic product, usually used for demonstration, display, teaching, guidance and other occasions. There are a few steps to pay attention to when using a laser pointer: Install the battery:

The laser pointer usually uses a button battery or a button battery, open the battery compartment at the rear of the laser pointer, and install the battery correctly according to the positive and negative poles. Turn on the laser pointer: Turn on the laser pointer by pressing the button above the laser pointer or by pulling the button on the end of the pen.

Adjust the focal length: Some laser pointers can adjust the focal length or bright oak to adjust the key to the spot size as needed. Point at the target object:

Point the laser pointer at the target object that needs to be demonstrated or demonstrated. Turn off the laser pointer: After using the laser pointer, turn off the laser pointer in time to avoid accidentally injuring others or animals.

It should be noted that laser pointers belong to the category of lasers, and their rays have a certain amount of laser radiation, so they should be used safely and avoid direct irradiation to the eyes to avoid damage to the eyes. I hope you find it helpful.

Laser pointer: The visible laser is designed and processed into a pen-shaped emitter, which is a pen-shaped emitter designed to be portable, easy to hold, and processed into a laser module (light-emitting diode). Common laser pointers include red (=650 660nm, 635nm), green (=515-520nm, 532nm), blue (=445 450nm) and blue-violet (=405nm).

The laser light in a laser pointer is the light emitted by the particles around the atom during an energy transition after being excited by a photon. It has the characteristics of high brightness, high directivity, high monochromacy and high coherence. Its beam is precisely focused on the focal point and produces a high power density, resulting in high temperatures near the focal point, i.e., the thermal effect of the laser.

Laser pointers, also known as laser pointers, pointing pens, etc., are pen-type emitters that are designed to be portable and easy to hold by laser and processed into laser modules (light-emitting diodes). Common laser pointers include red (=650 660nm, 635nm), green (=515-520nm, 532nm), blue (=445 450nm) and blue-violet (=405nm).

It is usually used by debriefing, teaching, and tour guides to project a point of light or a ray of light pointing at an object, but it is not suitable for use in specific places, such as art museums (some paintings are afraid of light), zoos, etc.

Improper use of laser pointers may cause severe damage to the retina and even blindness, and should not be used by children.

For details, please refer to .

Laser pointer principle:

The laser diode is powered by a battery and is driven to emit light by a constant current drive circuit.

532nm green light: The laser diode emits infrared light with a wavelength of 808nm, which is converted into infrared light with a wavelength of 1064nm through the YVO4 optical crystal or neodymium-doped YAG optical crystal, and then the 1064nm infrared light is doubled through the KTP crystal to output 532nm green light.

650nm red light, 635nm orange-red light, 445nm blue light, 405nm violet light, 808nm infrared light, these are all directly emitted by the laser diode.

No, inside the laser pointer is a semiconductor laser, which belongs to a type of LED. An optical lens is usually added to the front for focusing. The laser emitted by the laser pointer belongs to the solid-state laser, and the solid-state laser inside the laser pointer is also a laser diode.

Most of the current laser pointers are red, and the length that can be indicated is relatively far. Laser pointers, also known as star pens, handheld lasers, etc. It gets its name because it has a very intuitive visible beam and is mostly used for indication.

Because of its bright beam and strong anti-stray light interference, it is now widely used in teaching, scientific research, construction engineering, astronomy and other industries. There are fewer green and blue ones, which are difficult and expensive to make. Laser energy is quite concentrated, it is harmful to people, and it cannot be directly directed at the human body, especially the eyes, and there is a danger of blindness in irradiating the eyes.