Enhancing Medical Microscope Imaging with Rhonda's H2 System-on-Module

A project for a global manufacturer of optical components has been successfully developed by Rhonda Software to build a high-end video camera for medical microscopes. Rhonda Software's expertise in camera image quality and software customization was utilized for product improvement based on the Rhonda H2 SoM hardware platform.

Project requirements

• The camera should support video recording in various formats, spanning from 1080p30 to 4Kp60
• The camera should stream the video over Wi-Fi to mobile devices in 1080p30
• The video streaming over UVC to PC should range from 1080p30 to 4Kp60
• Provide the capability to capture still images with a resolution of 12MP, supporting both JPEG and DNG formats for image storage
• Enable camera settings adjustment via mobile phone and IR remote control
• Preview video content on a TV via HDMI
• Playback videos and still images on a TV
• Incorporate a graphical user interface in the HDMI preview and playback modes

Solution provided

• Rhonda H2 SoM: The foundation of the camera system
• IMX 577 Image Sensor: Providing high-quality image capture
• Custom Carrier Board: Facilitates connections to PCs via USB-C, external power input, includes various features such as IR-receivers, RTC with a CR-2032 battery holder, a buzzer, power converter, a button, and connectors for power, USB Type-C, and micro HDMI. The power converter supports multiple voltage options (5V, 12V, or 24V)

As a part of the project, Rhonda Software has developed an Android mobile application to manage camera settings and receive video streaming over Wi-Fi.

In addition to fulfilling the primary camera requirements, we have navigated non-typical challenges. One example emerged from the specialized optical system of the camera, meticulously designed for microscope applications. This optical system features a long-focus lens, making the precise positioning of IQ charts quite a difficult task. Adding to the complexity, the optical system lacked a coating, which resulted in substantial flare issues.

Another notable challenge revolved around the use of physical, tangible light filters for the camera. Consequently, we found it necessary to deactivate our default Auto White Balance algorithm and undertake individualized AWB calibration for each filter during the manufacturing process. Then, we developed a feature – Quick White Balance calibration – enabling users to swiftly align the camera with a neutral gray background, such as a sheet of paper, for precise white balance adjustment.

Factory

To enhance the yield rate during the manufacturing of cameras and to systematically verify the camera assembly processes, we have established a Rhonda factory pipeline. It includes distinct validation stations, each focused on verifying specific assembly steps, as well as the Output Quality Control station that completes the pipeline.

Conclusion

Through a collaborative effort between the optical components manufacturer and Rhonda Software, the digital camera module for a high-precision medical microscope was successfully developed. The integration of advanced hardware components, customized software, and factory pipeline tools ensured the camera's performance and uncompromised quality, making it a valuable addition to the MedTech industry.

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