Oppo unveils 85-200mm continuous zoom lens, RGBW sensor for smartphones

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Oppo held an event today, revealing its latest smartphone photography advancements that it will incorporate into its devices as soon as later this year.

Oppo unveils 85-200mm continuous optical zoom periscope, 5-axis OIS

The event, led by Oppo's Director of Imaging Simon Liu, saw the introduction of a new sensor, a variable zoom lens, new lens and sensor stabilization and improved algorithm to control the pixels over next-gen under display cameras.

New RGBW sensor

Oppo's newly-developed RGBW sensor adds white sub-pixels to the red, green and blue array and uses a 4-in-1 pixel binning for resulting final images.

Oppo claims eliminating every other color filter allows for 60% more light to be captured and a 35% improvement in noise reduction over conventional sensors.

Oppo claims that it's using 'ground breaking' DTI (deep trench isolation) for isolating the light gathering pixels from one another to reduce pixel cross-talk and improve image quality.

The 4-in-1 binning on the other hand improves color performance and prevents moire patterns.

The new sensor is coming to Oppo phones starting Q4 of this year, but we are yet to find out in what size or resolution.

OPPO 85-200mm Continuous Optical Zoom

The camera module with continuous optical zoom is arguably the most interesting of Oppo's announcements. It's a module with moving lens elements that allow for continuous optical zoom between 85mm and 200mm.

The module has a tunnel magnetoresistance (TMR) sensor that allows the lenses within to move precisely and with stability. The lens elements are a combination of glass and

plastic with two ultra-thin aspheric glass lenses. Then there's a guiding shaft motor that does the moving.

This solution avoids issues such as color and white balance inconsistency between cameras in a multi-lens system.

Oppo isn't saying when we can expect the continuous optical zoom in a production device. Then there's the possible issue of size - such a module would be very big for a phone, which would likely mean that it would need to be paired with a relatively small sensor and have a relatively dim aperture. All of this is hypothetical at this point.

OPPO Five-axis OIS

Oppo's newly-developed OIS works by combining both lens and sensor stabilization. When movement is relatively low, the system uses the lens mechanism for horizontal (X) and vertical (Y) shifting. When movement becomes more severe the sensor shift kicks in to additionally combat the horizontal (X) and vertical (Y) shifting, as well as rolling.

Oppo's five-axis OIS is expected in produts from Q1 of 2022.

OPPO self-developed algorithms for next-gen under display cameras

Finally Liu talked about a new algorithm for controlling the pixels over Oppo's next-gen under display cameras.

The new algorithm will work with pixel density of 400ppi over the camera. Combined with transparent wiring and improved pixel circuit wiring, Oppo promises to control chromaticity and brightness much better than currently available solutions.

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