Are you invested in diffractive optics or something mate?

there are a bunch of misconceptions in your message, but mainly:
1. There are A LOT of PL-mount full frame cinema lenses: Cooke S7/i line, Zeiss CP.3 & Supreme Primes, Canon's own Sumire line etc.
2. There are PL-mount full frame cinema cameras, like RED Monstro 8K VV
3. Ironically 1DC captures 4K with APS-H crop
NOW there are but ten years ago, then it was only high end Cooke S-series or Zeiss/Arri Master Prime or Leica Summilux in S-35 sizes and they they DID NOT HAVE Full Frame lenses in modern cinema focal lengths. It wasn't until the 65mm Sensor Phantom Gold 4K Camera was introduced almost a decade ago that large format lenses began appearing for non-film cameras.
Phantom Gold was one of the FIRST large format cameras and the only thing out there was some Panavision 70 mm and Arri 70mm lenses which were adapted for it.
I have the four 1Dcs for my general daily web-based operations and I just use our Canon 16-to-35 mm lenses or the 85mm on them and it works fine for video! We do have a few sets of Zeiss/Arri Master Primes and a few sets of Leica Summilux-C but those are for the Canon C700 GS which is an S-35 PL mount.
In terms of Diffractive optics, the parent company does have a specialty group in that field but the focus is now more on high refractive index Acrylic plastic lenses or negative index metamaterials which BYPASS the concept of lenses entirely. Basically we glue a strand of single-mode glass fibres to each large sensor's photosite and point them all as a group in the right direction with a small micro-lens at the other end of each fibre strand being the zoom elements and that means NO MORE normal zoom or prime lenses are needed! We just capture and bend some incoming lightwaves from a specific direction and direct then onto a single photosite and then output sample ALL of the photosites all at once global shutter style at 64-bits (16-bits per RGB + UV or IR channels)
You DO NOT NEED actual primes or zoom lenses because the single-mode glass fibres with their attached micro-lenses ARE the zooming element in themselves when properly oriented and bent at specific angles to ensure a zoom-lens-like emulation. The DSP and image processing software takes care of figuring WHAT type of orientation and fibre bend would create a series of pixels of a specific colour value at any given emulated focal length which can range from 12mm to 9600 mm equivalent, all within a cubic volume only a little larger in size as a Size 14 US shoebox! That means we can put MANY focal lengths in the same box assembly weighing little more than 20 kilos!
THAT is the future of computation photography where bunched-together glass fibre bundles ARE both a zoom lens and a prime lenses AT THE SAME TIME and WITHIN THE SAME BOX! We have versions in operation now and us and other companies are releasing versions for engineering use later next year. Consumer-level pricing for such gear is probably five to seven years away at my guess simply due to cost of manufacturing the glass-fibre bundles and attaching and KEEPING each strand attached properly to a single large-sensor photosite. IT IS NOT EASY to do that on a consistent basis!
WE DO, HOWEVER, have OTHER technologies in the development stage that use 3D-printed layers of Acrylic to form SOLID PLASTIC waveguides that perform the same operation for EACH photosite. That would make a multi-focal length combo-zoom/prime lens system MUCH CHEAPER than using bundles of glass fibre!
All Coming Soon to a Theatre and Store NEAR YOU!
V