Focus tester FD for measuring and displaying the focal position shift from the reference lens.
FD-300N
Instantly measure the deviation of the focus position and contrast relative to the reference lens! Measurement of focal length.
It can instantly and quantitatively measure the amount of focus shift due to aperture, not only for fixed lenses and zoom lenses. It can measure the focal length error. By projecting a chart onto the lens and scanning a mirror placed on the image plane up and down, it precisely counts the focus position. With 16 levels of sensitivity adjustment, it has a wide measurement range and supports various types of lenses. It is capable of RS232C communication, making data control via PC easy. Because it provides precise measurement results in a short time, it is extremely valuable not only for development but also for inspection processes on manufacturing lines.
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basic information
Specifications Measurement Items: 1. Focal position of the lens ±Δf relative to the reference focal position (0 reference) 2. Contrast Amount of contrast relative to the reference lens Collimator Lens: f=300mm D=50mm Test Lens: f=10–75mm Sensitivity Switching: 16 levels in total Measurement Accuracy: 1/100 mm Display Resolution: 1/1,000, rounding 5/10,000 External Communication: RS-232C Power Supply: AC100V, 50/60Hz Power Consumption: Approximately 150VA Dimensions: [Main Unit] 920(W)×340(H)×340(D)mm [Display Unit] 156(W)×66(H)×100(D)mm Weight: 40.0Kg
Price range
P5
Delivery Time
※The delivery date may vary depending on the situation, so please feel free to contact us.
Applications/Examples of results
Each lens manufacturer primarily uses our products in the inspection and adjustment processes centered around the development and manufacturing lines of various camera lenses. We customize specifications according to the usage needs of each company, allowing for a wide range of measurement methods and objects.
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Company information
For more than half a century, Tsubosaka Electric has specialized in the development and manufacturing of precision inspection equipment for cameras, serving clients both in Japan and internationally. Our measuring instruments have played a vital role in enhancing camera quality since the days of film cameras, supporting camera manufacturers in their production and inspection processes. We offer a comprehensive lineup of inspection and measurement solutions, including: evaluation stable light sources (luminance boxes), shutter testers, electronic collimators, aperture area meters, lens testers, and strobe testers, etc. From hardware design to software development, our products are developed entirely in-house to ensure seamless integration and top-tier performance. Recognized for our manufacturing excellence, we are ISO 9001 certified and trusted by major camera manufacturers worldwide. Our expertise also extends beyond the camera industry, and we also can develop optical measuring instrument for advanced medical devices and autonomous driving where they use proprietary optical sensing technology. Additionally, our contrast testers used to measure the contrast values of resist inks in LCD color filters that are contributing to the advancement of high-definition and high-contrast TVs and monitors across the globe. At Tsubosaka Electric, we pride ourselves on flexibility and innovation. We offer a wide range of customizable measurement solutions and are happy to accommodate special orders tailored to your specific requirements. Please feel free to consult with us.