Patent ID: 8821790

Claim:
A diagnostic measuring system comprising: a diagnostic tape unit comprising a tape cassette for blood sugar tests, the tape cassette having a test tape that is wound onto or can be wound onto a spool as a tape reel, the test tape comprising a light-transmitting transport tape and a plurality of spaced apart test elements mounted thereon, the test elements each comprising an analytical reagent layer supported on a carrier foil layer, and further including an adhesive tape layer connecting the carrier foil layer adhered on one side with the transport tape adhered on an opposite side, wherein a front side of the reagent layer faces away from the carrier foil layer and is configured for the application of a sample substance, the test elements in combination with the transport tape in each case foaming an optical multi-layer system for a rear-side reflection-photometric measurement of the reagent layer, wherein the transport tape, the adhesive tape layer and the carrier foil layer of each test element each have optical properties comprising refractive index, transmission and haze, and wherein at least one optical property of the transport tape, adhesive tape layer and carrier foil layer are matched within predetermined tolerances; and a reflection photometric arrangement oriented towards the rear side of the reagent layer of the test element located in a measuring position, the reflection photometric arrangement comprising a light source and a photodetector where the photodetector is arranged outside the direct reflection path of the measuring light radiated by the light source through the multi-layer system onto the reagent layer.