8. Laser tag or Laser Quest type games were developed as a non lethal training program for the US army in the 1970s. These days laser tag is generally used as a fun day out for the family or to run off all that sugary birthday cake energy!

3. The beam of light emitted from a laser is so intense that it can cut right through the densest materials, including metal, leather, marble, ceramics, and much more, but the laser beam has no inherent temperature. The heat is the result of the laser beam hitting the surface and changing from light energy into heat.

DOFsimulator

Especially in FEA DOFs has greater importance due to the fact that, FEA simulation solution (time) depends on number of degrees of freedom of the system to be analyze. We will discuss at the end how DOFs affect the solution time.

If you're looking for something amazing and world altering in terms of scientific breakthroughs, but can also be used as a way to entertain your cat... you're going to be a very satisfied human. Laser technology is widely varied, and holds many possibilies for the future.

dof自由度

We use our lasers to mark and etch into equipment, tools, panels, tags & labels, personal momentos, firearms, stainless steel tumblers, cutting boards, custom artwork, etc., etc., etc... (the list goes on and on, pretty much limited only by your imagination!) But we are by no means the only industry that uses lasers. Modern society uses lasers in the medical field, such as eye surgery, hair removal, and tattoo removal. You can play a round of laser tag or torture your feline friend for hours on end. You'll find them in CD players, barcode scanners at the supermarket... even in the fashion industry. If you take the time to think about it, you'll probably realize with one trip to the hardware store that lasers now appear on just about every DIY tool on the market.

Thus it concludes that DOF is a very important concept. In FEA, we use it for the individual calculation points (used to solve partial differential equations). The total DOFs for a given mesh model is equal to the number of nodes multiplied by the number of dof per node. More the number of dofs, higher the equations & large solution time.

Shallow depth of field

6. Astronauts on the Apollo 11 space mission in 1969 used a laser to measure the distance between the earth and the moon. Their readings were accurate within a fingers width.

Depth of focus

Now you might understood the concept of degrees of freedom. But as mentioned earlier the FEA solution time depends on total number of dof of the system to be analyze, but How?

If you have any questions or want to inquire about laser engraving, contact us. We love our customers and are here for you... it's just what we do!

As we know that, any object or component have infinite number of points and you use FEA to convert infinite to finite ( limited number) of points with the help of discretization for analysis. Discretization i.e. meshing is used to create finite points as elements and elements forms nodes at joining. But all elements does not have 6 dof per node. The number of dofs depends on the type of element (1D, 2D, 3D), the family of element (plane stress, plane strain, membrane, thin shell, etc.), and the type of analysis. For example, for structural analysis of vessel, a solid elements has 3 dof/node (3 transnational) while if you use shell elements at mid-surface may have 6 dof/node (3 rotational and 3 transnational) and if you do thermal analysis of shell, you will have only single dof/node. For beginner, it is quite confusing but once you will practice, will understand the logic’s behind specific number of dofs to different elements and analysis types.

depth of field中文

The term degrees of freedoms is most widely used in various fields like statistics, machine tools, mechanisms, vibration, FEM, etc. Whatever the field, the number of degrees of freedom can be defined as the minimum number of independent coordinates that can specify the position of the system completely.

Refer Figure 1, the point force is acting at the end of the rectangular beam, Due to downward load application, the beam will deformed to new position, consider the particles in small color region at end of beam and try to identify the location of particles for the new deformed position. Can we say that, we can solve this problem?  We can say yes, if we are able to define the new position (deformed position) of each and every particle of the beam. So how do we get that?   We will get the deformed position, only after identifying the number of parameters to define the new position from existing one. We will need coordinates in different planes, respective angles and distances from the origin, etc. then only we are able to define deformed position.

Depth of field calculator

1. Lasers cannot be seen in space because they have no matter. The matter causes the scattering effect which would actually give the appearance of a light bulb.

So whether lasers are as much of an obsession in your life as they are in ours, or you just like to learn something new every once in a while... get ready to be amazed!

What is DoFin photography

The minimum number of parameters (motion, coordinates, temperature, etc.) required to define the position and state of any entity completely in space is known as degrees of freedom (dof).

Now let’s discuss about 2D space, when we talk about 2D space, movement can be possible in two directions. Figure 3 shows the point A in 2D planer problem, here in order to define the position of point A completely with respect to origin, you need two parameters i.e. X1 & Y1, it means two dofs (translation X & Y). Suppose if point A is part of line (line AB), in such case you will also need one angle to define along-with two translations i.e. 3 dofs (two transnational and one rotation).

10. A tiny laser beam can be powerful enough to etch a serial number onto a diamond, the hardest natural substance is known to man.

Depth of field

Let’s start with simpler 1D space which will be easier to understand. There are very limited uses of 1D in FEA…in fact that, it is only used to tally the FEA results with hand calculations. 1D space consist only 1 dimension and hence the matrices are small resulting quicker solution to the problems.

The laser used to be a modern and futuristic invention, and while we still have yet to fully understand it's capabilities, we are seeing them used more and more in our daily life.

3D space is more realistic and accurate environment for FEA as most of problems lies in 3D space. Now suppose the line AB is rotated arbitrarily with respect to origin and shifted out of the plane is as shown in Figure 5. Here in 3D space, to define the position of point A or any point on line AB, the minimum number of parameters would be 6 DOFs, i.e.3 transnationals (Ux, Uy, Uz) & 3 rotations (Rx, Ry, Rz).

Theodore Maiman is credited with the discovery of the laser in 1960, but history can trace it back to Einstein's theory of light emission in 1916.