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Category: Optics / Lenses / Filters

My name is Ken Schuler, I am working with Orion Tech to see if we can find the right combination of camera/sensor/lens for a project we are working on. We had a sales rep, Kiran Devkota, but his phone disconnected. Here are some of our requirements; Camera *monochrome, decent resolution sensor. *USB interface. *IR capabilities, unit will be operating in darkness under an IR source. *C or Cs mount depends on the type of lens. Lens *A focal point of 90mm. *A field of vision of 35mm at the 90mm. *A Depth of field of at least 6mm. Any help you could provide would be much appreciated. Thank you, Ken Schuler Noss4ra2@gmail.com 302.757.9544

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We work in a flour mill, and we currently have a SICK sensor that detemines bag placement on a packaging line. We have SICK part#:1029584. It appears that flour dust is getting behind the lens and not telling the bag when to stop in the proper position. Our PM basis was orginally every 6 months we would change out the eye. We have changed the eye on 4 occasions in the last four months. The last eye we installed only lasted for approximately 4 days. Is there a different product we should be using for this environment? Is there any recall on this particular product?

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I have a Pentax 8x25 6.2 binoculars model# 126043 that's missing the right plastic piece that the eye cup fits over. Do i need to send this in for repair or a piece be shipped to me?

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What is the use of dilation filters?

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I need to inspect long metal tubes used in automobiles for any presence of clinging burr inside it. Also I need to measure the OD of it on both sides. The OD of tube is 50 mm, length is of 1200 mm and ID is of 45mm. I am not able to find any lens with suitable depth of field (at least 600mm) so that the burr is visible clearly.Please suggest us the suitable lens. I am in a very bad need of the solution. I tried using normal lens of 25mm focal length in which case I had to position the camera at the distance of 1.75 meters from the object. This distance is too impractical to implement. I request you to suggest a cost effective solution in the lens or combination of lens for this problem.

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Lens Selection. I am new to machine vision and need to select a lens for my project. I have used some of the lens selection tools on the internet but was not happy with the initial results. Here are the basics of my project: Camera 1/3" sensor, C-mount. Resolution 1024x768. Working distance 18". Object measurement 18"H x 24"W. The lens typically recommended is a 3.5mm lens. I purchased one and found a lot of fish eye distortion and inability to properly focus (lens already at infinity) when at 18" working distance. Field of view was ok, but focus and distortion where the problems. Any help or direction would be appreciated.

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How could I choose a lens according my cameras, like focal length, lens mount?

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I have found Kowa 10 megapixel "c" mount machine vision lenses. I understand there are even higher resolution lenses out there that are c mount, but I cannot for the life of me source them. Do you have information on anything higher than 10 megapixel lenses?

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Can you tell me if LCD technology is currently used as a method to control the amount of light reaching the sensor (i.e. a shutter) ?

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Hello! Is there a fast focusing technique for C-mount lenses (< 20 ms). The range of the focus distance is about 200 mm. I've found a product with piezo actuators - but it seems that this only works in microscopy. Another possibility would be lenses with a very high depth of focus. Since I have to cover an area of about 300x200 mm and have short (<50µs) exposure times I can not close the iris to much to enhance the depth of focus because there would not be enough light. Perhaps you can provide me with other ideas or you know companies that concentrate there work on these topics. Thanks and best regards Martin Wollendorfer

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Do you know what filters will work with a Navitar 59 LGM 601 lens? I am looking to cut down on the amount of light with ND filters or Polarizing filters.

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Dear Sir/Madam, we are using EKE light bulb (21V 150W) to do some experiments. We want to know the relative light intensity at different wavelength from 400 to 500 nm. This information is very important to our experiments. Please help me. Thanks.

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Good Day, What lense i have to use to inspect small pieces like corn grains (FOV: 1 cm X 1cm ) at a work distance about 70 cm. Thanks.

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Our application depends on holding very tight alignment of the image. Unfortunately, there is enough slop in the C-mount lenses we use that the image shifts due to vibration. The movement seems to be related to looseness in the focusing mechanism. We have tried several lenses from different sources but none have proved rigid enough. Does anyone have a suggestion on lenses to try or modifications to existing lenses that would make them more rigid?

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Please give me some basic information about lenses used in machine vision. What is the main function of lenses in machine vision application?

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I am in the process of developing a spreadsheet to calculate the minimum object distance and FOV for various C-Mount camera and lenses when various spacer rings are inserted. Unfortunately the range I am dealing with (f<10x object distance) the thin lens approximation is apparently not valid, which I verified with data and calculation. Any suggestions would be appreciated.

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