High-power LED illumination from TPL Vision enables vision systems to operate at maximum accuracy by providing the best balance of brightness & homogeneity. Our ...

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EO Infinity Corrected Long Working Distance Objectives that offer long working distances and high numerical apertures are available at Edmund Optics.

Technically, focal length is the distance between the point of convergence and the camera sensor, but that’s not a particularly easy way to understand it. Instead, imagine a simple lens with one piece of glass focusing the light onto the sensor. The distance between the lens and the sensor is the focal distance. So, in a 100mm lens the distance between the glass and the sensor is 100mm. It’s as simple as that.

Field of view vsangleof view

The OCT phantoms offer a controlled sample for testing and calibrating OCT systems featuring well-characterized optical properties such as refractive index, scattering coefficient, and absorption coefficient for ensuring accurate and reliable measurements.

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Customized camera configurations support diverse applications.Teledyne Vision Solutions showcased its latest products and solutions at the VISION 2024 exhibition, held earlier this month, in Stuttgart, Germany.

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Edmund says that “the addition of biological tissue phantoms is a significant milestone, expanding our portfolio beyond traditional optical components. This step provides off-the-shelf, standardized tools for researchers and industry engineers in biophotonics.”

Teledyne’s DALSA, e2v, Flir, Lumenera and Adimec businesses presented a vertically-integrated portfolio of industrial imaging technology. New products introduced included:

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Focal length is a technical characteristic of a lens, related to the way it works, rather than its actual size. You can experiment with focal length in your photography to change perspective, play with depth of field and zoom in / out on your subject.

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Very wide angle of view, up to 180 degrees. This causes considerable distortion but captures a huge amount of the scene.

Now available off-the-shelf in designs including “point spread, multilayer, pyramid, and multipurpose”, the phantoms ensure accurate testing of system parameters like depth resolution, image contrast, and sensitivity, providing consistency across clinical and research measurements.

A compositional feature of focal length is the way it alters perception of depth. Short focal lengths make objects look farther apart whilst longer lengths compress distances and make objects seem much closer together. Therefore, a wide-angle lens makes backgrounds seem far away whilst a telephoto lens brings them much closer.

Picks out distant objects and fills the frame with a small part of the scene. The shallow depth of field is popular with portrait photographers because it throws the background out of focus.  Also used for general nature and wildlife work.

Expanded portfolio: OCT and diffuse reflectance phantoms.Edmund Optics has announced the addition of optical coherence tomography phantoms and diffuse reflectance phantoms to its product portfolio, now providing off-the-shelf, standardized ready-to-use tools for researchers and engineers for the calibration and optimization of imaging systems in research and clinical applications.

Field of view

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Additionally, the diffuse reflectance phantoms simulate the optical properties of biological tissues for calibration, characterization, and analysis in biophotonics applications.

A lens suited to most subjects, from portrait to landscape. There is minimal distortion and can use large apertures down to f/1.8, etc. Good for portrait, nature, low light, and general use.

FOV tofocal lengthcalculator

Expanded portfolio: OCT and diffuse reflectance phantoms.Edmund Optics has announced the addition of optical coherence tomography phantoms and diffuse reflectance phantoms to its product portfolio, now providing off-the-shelf, standardized ready-to-use tools for researchers and engineers for the calibration and optimization of imaging systems in research and clinical applications. The OCT phantoms offer a controlled sample for testing and calibrating OCT systems featuring well-characterized optical properties such as refractive index, scattering coefficient, and absorption coefficient for ensuring accurate and reliable measurements. Now available off-the-shelf in designs including “point spread, multilayer, pyramid, and multipurpose”, the phantoms ensure accurate testing of system parameters like depth resolution, image contrast, and sensitivity, providing consistency across clinical and research measurements. Additionally, the diffuse reflectance phantoms simulate the optical properties of biological tissues for calibration, characterization, and analysis in biophotonics applications. Now available off-the-shelf in sizes of 25x25 mm and 50x50 mm for muscle, brain, and adipose tissue, these phantoms suit applications like spatial frequency domain imaging, diffuse reflectance spectroscopy, and diffuse Raman spectroscopy. Edmund says that “the addition of biological tissue phantoms is a significant milestone, expanding our portfolio beyond traditional optical components. This step provides off-the-shelf, standardized tools for researchers and industry engineers in biophotonics.” Teledyne presented latest imaging technologies at VISION Customized camera configurations support diverse applications.Teledyne Vision Solutions showcased its latest products and solutions at the VISION 2024 exhibition, held earlier this month, in Stuttgart, Germany. Teledyne’s DALSA, e2v, Flir, Lumenera and Adimec businesses presented a vertically-integrated portfolio of industrial imaging technology. New products introduced included: Linea HS2 TDI line scan camera range, designed for ultra-high-speed imaging in low-light conditions. It delivers high image quality with 16k/5 µm resolution and an “industry-leading maximum line rate of 1 Megahertz, or 16 Gigapixels/s throughput”. Optimom 5D turnkey imaging module features the Topaz5D image sensor, a compact board, standard connector, and a pre-assembled lens. This board-level vision extension integrates full-HD 2D vision with the generation of 3D depth data. BOA 3 smart camera, an integrated vision system in a compact, rugged smart camera format, combines advanced sensor and AI inspection technologies for industrial automation and inspection. Dragonfly S camera series, designed with modularity and simplicity in mind, empowers vision system designers by allowing customized camera configurations to precisely meet their needs. Bumblebee X is an industrial grade (IP67) stereo vision solution with onboard processing to build systems for warehouse automation, robotics guidance, and logistics. SightBase, a software-as-service platform, revolutionizes the design-in process and empowers machine vision system integrators to create robust solutions. Forge 1GigE SWIR camera series features the latest Sony Sen-SWIR InGaAs sensors in a highly compact form; and The Forge 1GigE IP67 delivers a new series of affordable GigE Vision interface cameras engineered for industrial imaging applications that need ingress protection (IP67), and robust data capture and transfers.

Now available off-the-shelf in sizes of 25x25 mm and 50x50 mm for muscle, brain, and adipose tissue, these phantoms suit applications like spatial frequency domain imaging, diffuse reflectance spectroscopy, and diffuse Raman spectroscopy.

Depth of field, how much of the shot is in acceptable focus, changes with focal length. Shorter focal lengths not only capture a wider view, but they also have a deeper depth of field. They can capture almost everything from right in front of the camera to infinity in acceptable focus. As focal length increases the depth of field decreases, so a longer lens captures a narrower band in acceptable focus.

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Distortion is small – vertical lines may curve but can be corrected later. It’s good for journalistic and real estate work because the angle of view is huge and so much is in focus.

Focal length

Short focal length lenses have a wide angle of view, hence the name “wide angle”. Longer focal lengths have a narrower angle of view, covering a smaller area of the scene. That’s why long focal length lenses seem to magnify the image - they capture a small part of the scene but still fill the sensor with it. A focal length of round 50mm is generally accepted as being about what our eyes see, which is why a 50mm lens is so often the standard lens that comes with the camera.

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Focal length influences how your camera records a scene. It determines the angle of view, or how much of the scene ends up projected on the camera sensor. It controls how magnified an image looks, it influences the depth of field and can alter perspective, making objects look closer together or farther apart.