Clad in black granite, the memorial has a glass chamber set into its face containing a book listing the names of every British policeman and policewoman killed on duty since records began.
Alongside this tablet sits a slender pillar of glass that emerges from a reflecting pool.
The realisation of the memorial follows a 10-year campaign by the film director Michael Winner, who founded the charity the Police Memorial Trust after the death of PC Yvonne Fletcher during the siege of the Iranian Embassy in 1984.
Winner said: 'I was absolutely determined that the police should have this memorial. They are fighting a war and, unlike the other services, their war has no beginning and no end.'
Speaking shortly after the ceremony, Norman Foster said: 'It is a huge privilege to have been part of the realisation of this memorial. I hope its simplicity will bring dignity to this forgotten corner and create an appropriate setting along this heritage route.'