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Industrial Laser Materials Processing

Le 30 octobre 2017, 09:00 dans Sorties 0

Metal foil cutting is based on the design of the battery, a roll of metal foil along the long side cut into thin strips. Applicable to this part is the infrared pulse laser, high-speed high-quality cutting electrode plating. If the cutting width and quality have more precise requirements, you can also consider the pulse green and ultraviolet light. Metal foil cutting links refer to the design of the battery, the elongated strip of the anode film and cathode film cut into the desired shape. Depending on the battery design and whether the foil is fully coated, you can select or adjust the beam to cut the coating or cut only the foil. The green laser pointer used in this section is the same as the aluminum foil slit.

The best way to cut the round hole is to 1: 1, that is, the ratio of aperture and plate thickness is 1: 1. Of course, this ratio, that is, the larger the pore size, cut out the high quality circle Hole is easier. Otherwise, when the fiber laser cutting machine energy is insufficient, the cutting hole easy to break point off point and round hole is not round the phenomenon. Round hole sometimes elliptical or irregular phenomenon This is related to the X Y axis motion does not match, and lead to X Y axis movement does not match the direct cause is the servo motor parameter adjustment is not appropriate. So the quality of cutting round hole, the servo motor also has certain requirements.

red laser pointer

Conventional fiber lasers use fiber-coupled technology to couple multiple beam outputs together, resulting in lower brightness of the output laser. The new generation of fiber lasers uses an innovative architecture that combines the pump diodes and drivers into separate pump modules. The gain fiber is mounted in a configurable gain module that can output more than 8kW of laser power. The gain module is based on the novel main oscillator / power amplifier (MOPA) design, enabling high-brightness most powerful laser output. In addition, the Ennie laser also uses a reliable integrated backlash isolator to protect all modules from the impact of backlit light, can be high anti-material full power, uninterrupted, stable processing. These two technological innovations play a vital role in RLS applications.

As we all know, graphene can be used to manufacture a variety of electronic, optoelectronic devices, more scientists predicted that graphene will "completely change the 21st century", it is possible to set off a sweeping global disruptive new technology and new industrial revolution. It is understood that this time through laser writing to upgrade the existing graphene technology, the process is similar to the use of laser beam "hammer" metal forged into three-dimensional form. Finally, through the experiment and computer simulation, we can observe the authenticity and mechanism of the two-dimensional structure of graphene carbon atoms to three-dimensional shape.

In 2016, China's industrial laser materials processing equipment market was about $ 3.8 billion, with an average annual compound growth rate (CAGR) of 12.51% over the past five years. The growth rate in 2017 is expected to be about 22%, the value will reach 4.6 billion US dollars. From this point of view, the global market for materials processing in 2016, the total market volume of about 12.6 billion US dollars, while the Chinese market reached the global laser materials processing equipment system revenue of one-third. Global burning laser materials processing system popular markets include smart phone manufacturing, aluminum deep processing of metal sheet cutting, electric vehicle batteries and display and so on.

The Best Cat Toys For Your Kitty

Le 26 août 2017, 12:13 dans DIY 0

Like people and dogs, cats benefit from keeping fit and active. Exercise is essential for your cat’s mental and physical health. It relieves stress and boredom, improves circulation, builds muscle tone and can prevent or reduce behavioral problems. To keep your cat fit and healthy you must play with them. There’s no better way to coax those “inner panther” instincts out than with a few good interactive cat laser pointer toys.

cat laser pointer

Wand toys

Wand toys are a simple stick with a piece of fabric or ribbon tied to the end of it. You can wave, twitch, flutter and circle the wand around randomly so that the ribbon moves like an insect or bird or other prey. It comes with the added benefit of keeping some distance between you and your cat’s claws.

There are endless variations of this toy. Some have real feathers attached to the end. Some have sequins or fake mice filled with catnip. You’re likely to find one with the right textures to get your kitty up and moving.

Don’t leave these toys out for kitty to play with without supervision. Watch for pieces of string or other components that might fall off the toy and get swallowed by your cat. Plus, think of it as a special treat. If this toy only comes out when you play with her it will remain attractive and interesting. Afterall, how many times have you seen mice and birds hanging out around a cat?

Ball toys

Ball toys are also attractive to many cats. When they scoot across the floor they mimic the movement of a mouse scampering by. You can insert treats or catnip into some balls to make playing with them more rewarding and exciting for your cat. There are also ball toys with bells inside them to attract your cat’s attention.

Some ball toys you might like to try:

Mylar balls (crinkly and shiny)
Ping-pong balls (watch for wear)
Sponge balls (nice and quiet)

Catnip toys

The majority of cats in the U.S will respond to catnip. Adding this herb to your cat’s playtime can increase her enjoyment! Try stuffing some catnip into a ball toy or spreading some out in a cardboard box. If you choose to let your cat ingest catnip, try to find one that is additive free. Beware, some cats get excited when they smell catnip. You may not know how your cat will respond. When cats get overexcited, they can sometimes bite.

Laser pointer

Laser pointers are great for cats that tend to be a little lazy. Most cats will become transfixed on the ever elusive red dot. If your cat won’t respond to other toys, but will respond to a laser pointer, great! But try not to rely on a laser pointer.

Because cats can’t catch the red dot they’re likely to become frustrated. Try starting kitty out with the cat laser pointer then switching to a different toy once she get’s excited and playful. That way she’ll have something to catch.

Our cats and dogs are like any other cats and dogs. They need playtime to stay active and fit. You can help by donating cat and dog toys to the shelter. We also need people to come play with our cats and walk our dogs.

The Theory of Laser Beam Expanders

Le 11 juillet 2017, 13:22 dans Sorties 0

A laser beam expander is designed to increase the diameter of a collimated input beam to a larger collimated output beam. Beam expanders are used in applications such as laser scanning, interferometry, and remote sensing. Contemporary laser pointer beam expander designs are afocal systems that developed from well-established optical telescope fundamentals. In such systems, the object rays, located at infinity, enter parallel to the optical axis of the internal optics and exit parallel to them as well. This means that there is no focal length to the entire system.

 

Theory: Laser Beam Expanders

In a laser beam expander design, the placement of the objective and image lenses is reversed. In the Keplerian beam expander design, the collimated input beam focuses to a spot between the objective and image lenses, producing a point within the system where the laser's energy is concentrated (Figure 1). The focused spot heats the air between the lenses, deflecting light rays from their optical path, which can potentially lead to wavefront errors. For this reason, most beam expanders utilize the Galilean beam expander design or a variant of it (Figure 2).

 

Keplerian Beam Expander

Figure 1: Keplerian Beam Expander

Galilean Beam Expander

Figure 2: Galilean Beam Expander

 

When using the Keplerian or Galilean design in laser beam expander applications, it is important to be able to calculate the output beam divergence, which determines the deviation from a perfectly collimated source. The beam divergence is dependent upon the diameters of the input and output laser beams.

 

beam expander

The Magnifying Power (MP) can now be expressed in terms of the Beam Divergences or Beam Diameters.

laser beam expander

laser pointer

 

Interpreting the above equations, one sees that while the Output Beam Diameter (DO) increases, the Output Beam Divergence (θO) decreases and vice versa. Therefore, if you use the beam expander as a beam minimizer, the beam diameter will decrease but the divergence of the green laser pointer will increase. The price to pay for a small beam is a large divergence angle.

 

In addition to the above, it is important to be able to calculate the output beam diameter at a specific working distance (L). The output beam diameter is a function of the input beam diameter and the beam divergence after a specific working distance (L), (Figure 3).

laser pen

 

Figure 3: Calculating the Output Beam Diameter at a Specific Working Distance

Working Distance

 

Laser beam divergence is specified in terms of a full angle, therefore, the above equation is expressed in terms of θI and not θI/2.

Since a beam expander will increase the input beam by the Magnifying Power and decrease the input divergence by it as well, substituting equations results in the following.

 

result 1

result 2

 

Application Example

Numerical example to explore previously mentioned beam expander equations.

 

Initial Parameters

 

Beam Expander Magnifying Power = MP = 10X

Input Beam Diameter = 1mm

Input Beam Divergence = 1mrad

Working Distance = L = 100m

 

Calculated Parameter

 

Output Beam Diameter

result 3

 

Compare this to the Beam Diameter without using a beam expander

result 3

 

Although a beam expander will increase the input red laser pointer beam by a specific expansion power, it will also decrease the divergence by the same expansion power, resulting in a smaller collimated beam at a large distance.

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