Learn the best ways to create amazing images and videos, share your works with the community and be inspired by our community.

PWM (Pulse Width Modulation) dimming changes pulse width to control brightness of LED lightings. Various PWM frequencies are available from 50kHz up to 1MHz.

BlueLED wavelength

Ultra-wide-angle lenses exaggerate perspective so distances between objects look bigger. When combined with the wide field of view, it can bring out a sense of space.

Learn the best ways to create amazing images and videos, share your works with the community and be inspired by our community.

Supplies a large range of Machine Vision Lighting, LED Ring, coaxial, Bar, Line, UV and IR Collimated lighting, Strobe and continuous lighting controller.

Fixed ratio beam expanders FEX series increase laser beam diameter. Fixed ratio beam expander FEX diversity cover the UV, visible, NIR spectral ranges.

LED wavelengthspectrum

When the LED element get heated, luminance is reduced and general performance deteriorates. The half-life of the luminance of an LED element is said to be around 40,000 hours (Typ.), but if the element is continuously used in a high-temperature environment, its performance may deteriorate quicker.

Also see: Why Is a Super Telephoto Lens Necessary for Sports Photography? What is the difference between a 200mm and 300mm telephoto lens?

Note: When using in conjunction with other equipment, the characteristics of the other equipment will affect the power supply, so be sure to choose a power supply that has a sufficient margin (around twice).

A shorter focal length… - Captures more of the scene (= has a wider angle of view) - Makes distant objects appear smaller (= has lower magnification)

Using the constant current circuit dependent on the input voltage, variations in the forward current of individual LEDs are corrected for uniform brightness. Meanwhile, the temperature compensation circuit compensates for fluctuations in brightness due to increases in temperature after lighting or changes in the ambient temperature.

Due to physics, a lens with a shorter focal length has a wider angle of view, and one with a longer focal length has a narrower angle of view. And that’s how we came to use focal length to describe the angle of view of a lens!

The lower the brightness, the smaller current flow to the LED an d heat generation is also smaller. Open camera's aperture as much as possible to reduce LED curren t.

Wavelengthof yellowLED

Brightness of LED lighting equipped with "FALUX sensing" can be controlled by controller equipped "FALUX sensing" feature by monitoring and feedback functions automatically.

Telephoto lenses provide an angle of view that is much narrower than human vision. 70-200mm lenses provide the classic telephoto focal range.

GreenLED wavelengthrange

The reason the LED light is selected as a light source for machine vision is because it facilitates optimal lighting for inspection.

This focal length is measured when the lens is focused to infinity (far into the distance). This is because when the lens is focused to infinity, light rays enter the lens almost parallel. When focused on a nearby subject, they enter the lens at an angle.

LED brightness sensing is performed using multiple built-in photodiodes. This allows for accurate measurement of LED brightness not only during continuous illumination but also with short period illumination. Absolute brightness is stored in the lighting's internal memory to allow for instrumental error adjustment. "FALUX sensing" also makes it possible to measure both the LED brightness of lighting and the internal temperature, and then to monitor those measurements on the power supply side. Based on the monitored values, feedback control can be performed from the OPPF Series controller, making it possible to maintain the factory default brightness for around-40,000 hors.

Fluorescent lamp and Halogen have wide wavelength distribution, but LED lightings have specific emission of light wavelength in each. When selecting LED lighting, please consider the feature of each wavelength.

Wavelengthof whiteLEDlight

The performance of LED Lighting is not affected much by switchin g. To extend the LED life, utilize the switching by external power supply.

RedLED wavelength

Ultra-wide-angle lenses take in so much that they are perfect for capturing grand scenes and large objects that are right in front of you, especially in tight spaces where you cannot move further back.

When picking a lens, one of the first things you must decide on is the focal length or focal range that you want. This is because the focal length describes the angle of view, i.e., it tells how much of the scene in front of you the lens can capture.

You need a very long focal length to capture a detailed close-up picture of the moon without cropping. The image above was captured at 1600mm using an 800mm lens and a 2x extender.

The camera captures a part of diffused light goes through the glass plate. Light diffuses to every direction so the camera's observation axis is not restricted. Since only a part of the light can be captured, brightness rather than evenness is required. Irregularities on the surface and areas of high reflectance are comparatively bright.

Reflected light is captured by the camera. Evenness of the light is required for capturing clear image rather than brightness. Irregularities on the surface and areas of low reflectance will be dark comparatively.

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Visible light can be seen by human eyes. Visible light generally has a wavelength of between 380nm and 780nm. Light with a wavelength longer than 780nm is infrared and light with a wavelength shorter than 380nm is ultraviolet. The human eye is most sensitive to green light with a wavelength of 555nm. Sensitivity decreases if the wavelength increases or decreases. The relative sensitivity curve when strength at 555nm is set as 1 is called "Standard CIE Relative Luminosity". Measurements of brightness such as lux and cd/m2 are coefficients of this Spectral Luminous Efficiency. The spectral sensitivity of a camera does not necessarily have the same distribution. The sensitivity of some cameras is set to match infrared or ultraviolet ranges. When setting Lighting, please check athat the light distribution matches the features of camera you are using.

LEDlightwavelength chart

By lighting with adequate shape and color, clear and sharp image with high SN ratio can be captured that will help high quality image processing.

Learn composition techniques that leverage on the characteristics of different lenses in: Professional Composition Techniques (3): Making Good Use of Lenses

When selecting the Lighting it is necessary to consider several factors. Even when using the same Lighting, if the height of the lighting is different the captured image will be completely different. Also, if the Lighting wavelength (color) is different, the images change. Please consider the points below:

Learn more about how to make the most of wide-angle lenses in: Exploring Wide Angle Lenses Part 1: Photo Effects of Wide-Angle Lenses 24mm Closeups: 3 Simple Exercises for Mastering Wide-Angle Perspective

We usually describe a lens by its focal length. What does it refer to and how does it affect your images? Find out in this article.

Brightness of LED lighting can be changed by ambient temperature of the LED lighting and also by deterioration of itself. By stabilizing brightness in the period of the LED lighting life, maintenance can be minimized.

Depending on the scene and your intentions, you might not need to go ultra-wide to frame what you want to show perfectly.

LED wavelengthfor skin

By combining the light of red, green and blue, you can create other colors. Green(G) and blue(B) make Cyan(C), B and red(R) make Magenta(M), and R and G make yellow(Y). By combining R, G, and B lights of the same strength, white(W) is created. Combining colors in this way is called additive color mixing and RGB are called Additive primary colors. Colors can also be created by absorbing parts of light. C absorbs R, M absorbs G, and Y absorbs B. C, M, and Y absorb all of the light, and black(K) is created. Combining colors in this way is called subtractive color mixing and CMY are called Subtractive primary colors. Following patterns show how the images change by color of lighting. In case of machine vision, most important point is the contrast between target part of the object and other part. The higher contrast, the better result the system will provide. Please refer following patterns when selecting lightings.

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To whiteline is to pass quickly between 2 cars on the white lines separating the lanes on a multi-lane highway or street. How did he make that whiteline?

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Notice how the buildings don’t appear to converge towards the top. They would on a wide-angle lens due to perspective exaggeration.

Let’s look at what happens when we shoot at different focal lengths from the same position. Note: For ease of illustration, the angles shown in this article are the horizontal angle of view.

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Following chart shows relative scattering rate presuming scattering rate of red light as "1". The shorter wavelength, the bigger scattering rate. This means that the short wavelength light can be reflected by small and narrow scratches more than longer wavelength light. Although, image sensor has small sensitivity for shorter wavelength light than green light. Infrared light can be used for inspection of object covered by film for example.

A standard or “normal” lens gives a perspective that is very close to that of human vision. Most kit lenses are standard zoom lenses. The popular RF50mm f/1.8 STM “nifty fifty” lens is a standard lens on a full-frame camera, whereas the RF28mm f/2.8 STM is a slightly wider standard lens on an APS-C camera.

201778 — This means that it is effectively like a very mild infra red filter and this explains some of the colour problems and why, even if you adjust ...

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Any focal length above 135mm full-frame equivalent is considered telephoto. However, 70 to 135mm (full-frame equivalent) is considered short or medium telephoto. These are popular for portrait and product photography due to their natural perspective and comfortable working distance for close-up shots.

The focal length also affects many other aspects of your image, such as perspective and depth of field. To find out more,  see 4 Lens Concepts to Revolutionise Your Photos.

The lamp emission spectrum distributions for each LED lighting series are displayed here. The horizontal axis is the wavelength (nm), and the vertical axis is the relative emission intensity. Data is for reference purposes. Please note that actual products will vary slightly.

Learn more about what you can do with a standard lens in: Standard Lens Techniques: Using the Point of View to Draw the Viewer In 50mm Portraits, My Style: Creating A Picture of a Memory

At 16mm, we can capture the entire façade of the fire station as well as the road and the hedge in the foreground. As the focal length increases, details appear bigger in the frame while more of the foreground and the building is cropped out. 200mm gives us a good close-up of the building name and the crests below it.

The camera is looking the lighting through the glass plate and the light goes through the glass plate is captured. Evenness rather than brightness is required in this case. Irregularities on the surface and areas of low reflectance are comparatively dark.

Coaxial Lighting is a type of Lighting in which the surface emitting part of the LED emits light along the same axis as the camera lens, via a half-mirror. The effective visual field of coaxial lighting is dependent upon the distance between the camera and object (WD), the distance between the Lighting and object (LWD), and the size of the light emitting surface. If the WD increases, the visual field grows, but if the LWD increases, the visual field shrinks. The method of calculating the effective visual field is shown at right hand side. It is necessary to keep the object within the effective visual field, especially for objects with a high reflectance. This effective visual field is calculated based on the size of the light emitting surface. It is recommended that you set a sufficient visual field, taking into consideration preventing lower luminance at the surrounding area.

Getting up close to birds and other wildlife requires a special type of telephoto lens: a super telephoto lens. You may want to combine it with an extender for even further reach.

Lenses are classified as wide-angle, standard, or telephoto depending on their focal lengths. Ultra-wide-angle lenses are a subset of wide-angle lenses, whereas medium telephoto and super telephoto lenses are subsets of telephoto lenses.

When you look straight ahead with your bare eyes, the field of view in focus is around 50° to 60°. Wide-angle lenses are any lens that gives a field of view wider than that. Ultra-wide-angle lenses are a special kind of wide-angle lens.

The camera captures a part of scattered light reflected off the surface. Light is reflected in every direction so the camera alignment is not so restricted. Since only a part of the light can be captured, brightness rather than evenness is required. Irregularities on the surface and areas of high reflectance will be bright comparatively.

A longer focal length… - Captures less of the scene (= has a narrower angle of view) - Makes distant objects appear bigger (= has a higher magnification)

Light entering the lens converges (crosses) on its way to the image sensor. This convergence point is known as the optical centre of the lens and has the sharpest focus. The focal length is the distance between this convergence point and the image sensor.