Our Industrial Lasers are more than just tools; they are the embodiment of meticulous design, setting new benchmarks in reliability and accuracy. Across industries, they have become indispensable, contributing to heightened efficiency and enhanced performance. Your industry deserves nothing less than the best, and that’s precisely what we deliver.

Elevate your workpiece positioning and alignment with Delta Lasers Technology Positioning & floor marking lasers. We meticulously manufacture advanced laser projectors in various wavelengths, optical-mechanical specifications, and laser power options.

Master high-traffic precision with exclusive 3R laser class Delta FM Series Lasers. Ideal for outdoor and indoor applications.

Advanced nonlinear optics and adaptive optics systems are being employed to counteract these effects. In high-power laser systems, maintaining beam quality ...

Delta VX Series Ø20 IP67 lasers offer precise positioning for part processing, with green and red options, up to 170mW output, and manual or fixed focus. They’re compact, durable, and ideal for image processing. Their robust design includes dust and water protection, vibration resistance, and high-quality optical components. The input power supply voltage is 9V DC to 24V DC.

focallength是什么

The focal length of a lens is a fundamental parameter that describes how strongly it focuses or diverges light. A large focal length indicates that light is bent gradually while a short focal length indicates that the light is bent at sharp angles. In general, lenses with positive focal lengths converge light while lenses with negative focal lengths cause light to diverge, although there are some exceptions based on the distance from the lens to the object being imaged.

Fiber Optic Cables are in stock at DigiKey. Order Now! Cable Assemblies ship same day.

Field of view describes the viewable area that can be imaged by a lens system. This is the portion of the object that fills the camera’s sensor. This can be described by the physical area which can be imaged, such as a horizontal or vertical field of view in mm, or an angular field of view specified in degrees. The relationships between focal length and field of view are shown below.

Align CO₂ and other infrared laser beam delivery systems with these dichroic beamsplitters that transmit IR and reflect HeNe or visible wavelength diode-laser ...

Knowledge Center/ Application Notes/ Imaging Application Notes/ Understanding Focal Length and Field of View

Example 2: For an application using a ½” sensor, which has a horizontal sensor size of 6.4mm, a horizontal FOV of 25mm is desired.

Note: Horizontal FOV is typically used in discussions of FOV as a matter of convenience, but the sensor aspect ratio (ratio of a sensor’s width to its height) must be taken into account to ensure that the entire object fits into the image where the aspect ratio is used as a fraction (e.g. 4:3 = 4/3), Equation 7.

In general, however, the focal length is measured from the rear principal plane, rarely located at the mechanical back of an imaging lens; this is one of the reasons why WDs calculated using paraxial equations are only approximations and the mechanical design of a system should only be laid out using data produced by computer simulation or data taken from lens specification tables. Paraxial calculations, as from lens calculators, are a good starting point to speed the lens selection process, but the numerical values produced should be used with caution.

Transform your outdoor space with our state-of-the-art laser display system for fixed installations. Boost your brand’s visibility with laser advertising and high-impact signage. Illuminate your building facade and highlight its unique architectural features with our powerful laser projector, Delta Logis.

We envision being the forefront innovator in the laser projection industry, setting standards for quality, precision, and reliability. We aim to reinforce industries globally with cutting-edge laser technology to enhance their processes.

Focallength

As previously stated, some amount of flexibility to the system’s WD should be factored in, as the above examples are only first-order approximations and they also do not take distortion into account.

Focaldistance vsfocallength

When using fixed focal length lenses, there are three ways to change the FOV of the system (camera and lens). The first and often easiest option is to change the WD from the lens to the object; moving the lens farther away from the object plane increases the FOV. The second option is to swap out the lens with one of a different focal length. The third option is to change the size of the sensor; a larger sensor will yield a larger FOV for the same WD, as defined in Equation 1.

Robut Stainless Steel lasers: Adjustable focus, vibration resistant, ideal for image processing, sensor integration, etc.

Focus distance

Our mission is to exceed the expectations of our customers with innovative, reliable, and highly practical laser projectors for various industrial and entertainment applications. We’re happy to go the extra mile to offer top-notch quality laser projection solutions that foster technical excellence, business growth, and, most importantly, customer satisfaction.

It might take a really long time to cure. UV curing resin has a wavelength requirement (UV light that is of shorter wavelength will cure it ...

Focallength camera

A fixed focal length lens, also known as a conventional or entocentric lens, is a lens with a fixed angular field of view (AFOV). By focusing the lens for different working distances (WDs), differently sized field of view (FOV) can be obtained, though the viewing angle is constant. AFOV is typically specified as the full angle (in degrees) associated with the horizontal dimension (width) of the sensor that the lens is to be used with.

While most sensors are 4:3, 5:4 and 1:1 are also quite common. This distinction in aspect ratio also leads to varying dimensions of sensors of the same sensor format. All of the equations used in this section can also be used for vertical FOV as long as the sensor’s vertical dimension is substituted in for the horizontal dimension specified in the equations.

The 14.25° derived in Example 1 (see white box below) can be used to determine the lens that is needed, but the sensor size must also be chosen. As the sensor size is increased or decreased it will change how much of the lens’s image is utilized; this will alter the AFOV of the system and thus the overall FOV. The larger the sensor, the larger the obtainable AFOV for the same focal length. For example, a 25mm lens could be used with a ½” (6.4mm horizontal) sensor or a 35mm lens could be used with a 2/3” (8.8mm horizontal) sensor as they would both approximately produce a 14.5° AFOV on their respective sensors. Alternatively, if the sensor has already been chosen, the focal length can be determined directly from the FOV and WD by substituting Equation 1 in Equation 2, as shown in Equation 3.

If the required magnification is already known and the WD is constrained, Equation 3 can be rearranged (replacing $ \small{ \tfrac{H}{\text{FOV}}} $ with magnification) and used to determine an appropriate fixed focal length lens, as shown in Equation 6.

The focal length of a lens defines the AFOV. For a given sensor size, the shorter the focal length, the wider the AFOV. Additionally, the shorter the focal length of the lens, the shorter the distance needed to obtain the same FOV compared to a longer focal length lens. For a simple, thin convex lens, the focal length is the distance from the back surface of the lens to the plane of the image formed of an object placed infinitely far in front of the lens. From this definition, it can be shown that the AFOV of a lens is related to the focal length (Equation 1), where $ \small{f} $ is the focal length and $ \small{H} $ is the sensor size (Figure 1).

Once the required AFOV has been determined, the focal length can be approximated using Equation 1 and the proper lens can be chosen from a lens specification table or datasheet by finding the closest available focal length with the necessary AFOV for the sensor being used.

Founded in 2011, Delta Lasers Technology is a leading company in the field of laser projection based in Bulgaria, Europe. We are driven by a commitment to technical excellence and a dedication to advancing laser technology to meet the needs and demands of various domains, spanning from industrial to entertainment.

focallength中文

Be aware that Equation 6 is an approximation and will rapidly deteriorate for magnifications greater than 0.1 or for short WDs. For magnifications beyond 0.1, either a fixed magnification lens or computer simulations (e.g. Zemax) with the appropriate lens model should be used. For the same reasons, lens calculators commonly found on the internet should only be used for reference. When in doubt, consult a lens specification table.

FOV tofocallength

About This Game. The Prism is a 2D puzzle platformer about two pixels, 02 and 03 lost inside a vast prison. Unlike a normal prison, this one is alive. It is ...

Introducing our latest product – the Delta 12-FB4 laser projector. With its superior quality and performance, it is guaranteed to leave your audience impressed. Get ready to make a lasting impact with this state-of-the-art technology.

Another way to change the FOV of a system is to use either a varifocal lens or a zoom lens; these types of lenses allow for adjustment of their focal lengths and thus have variable AFOV. Varifocal and zoom lenses often have size and cost drawbacks compared to fixed focal length lenses, and often cannot offer the same level of performance as fixed focal length lenses.

While it may be convenient to have a very wide AFOV, there are some negatives to consider. First, the level of distortion that is associated with some short focal length lenses can greatly influence the actual AFOV and can cause variations in the angle with respect to WD due to distortion. Next, short focal length lenses generally struggle to obtain the highest level of performance when compared against longer focal length options (see Best Practice #3 in Best Practices for Better Imaging). Additionally, short focal length lenses can have difficulties covering medium to large sensor sizes, which can limit their usability, as discussed in Relative Illumination, Roll-Off, and Vignetting.

\begin{align}\text{AFOV} & = 2 \times \tan^{-1} \left( {\frac{50 \text{mm}}{2 \times 200 \text{mm}}} \right)  \\ \text{AFOV} & = 14.25° \end{align}

You can use any of these test PANs in your API requests. If you need to provide an expiration date, any future date should work, e.g. 2077-03. If you need to ...

Focallength formula

In many applications, the required distance from an object and the desired FOV (typically the size of the object with additional buffer space) are known quantities. This information can be used to directly determine the required AFOV via Equation 2. Equation 2 is the equivalent of finding the vertex angle of a triangle with its height equal to the WD and its base equal to the horizontal FOV, or HFOV, as shown in Figure 2. Note: In practice, the vertex of this triangle is rarely located at the mechanical front of the lens, from which WD is measured, and is only to be used as an approximation unless the entrance pupil location is known.

The Delta F series lasers offer excellent performance in precise positioning. It is equipped with green, red, and IR diodes and offers a power range of 1mW to 200mW.

Note: Fixed focal length lenses should not be confused with fixed focus lenses. Fixed focal length lenses can be focused for different distances; fixed focus lenses are intended for use at a single, specific WD. Examples of fixed focus lenses are many telecentric lenses and microscope objectives.

At WOODCHUCK USA, we are all about putting nature back into peoples' lives. Through our BUY ONE. PLANT ONE. Program, we plant a tree for every product we ...

POLARIZE meaning: 1 : to cause (people, opinions, etc.) to separate into opposing groups; 2 : to cause (something, such as light waves) to vibrate in a ...

The Lumentum 1100 Series red helium-neon laser products offer low noise, high power stability, and long life for the most demanding applications.

We manufacture high-quality positioning lasers for various industries, including woodworking, stone, textile, cutting saw machines, zone marking, manufacturing, and automotive. Each laser is tailored to meet the specific needs of its industry, ensuring optimal precision and performance. Our reliable and efficient products help clients achieve their laser positioning goals.

Generally, lenses that have fixed magnifications have fixed or limited WD ranges. While using a telecentric or other fixed magnification lens can be more constraining, as they do not allow for different FOVs by varying the WD, the calculations for them are very direct, as shown in Equation 4.

For over 80 years Edmund Optics has been a leading producer of optics, imaging, and photonics technology. Science & Technology Barrington, NJ USA edmundoptics.

We are backed by technical experts to offer you the latest auxiliary tools for positioning, machine vision, laser projectors, and customer-specific lasers for industrial and entertainment needs. We are known to manufacture the best-in-class industrial lasers, and here’s why:

Note: As the magnification increases, the size of the FOV will decrease; a magnification that is lower than what is calculated is usually desirable so that the full FOV can be visualized. In the case of Example 2, a 0.25X lens is the closest common option, which yields a 25.6mm FOV on the same sensor.