The present invention provides a luminous keyboard, including: at least one key cap; a support plate; a support component, connected to the key cap and the support plate and capable of guiding the key cap to vertically move relative to the support plate; a thin film circuit board, disposed on the support plate; at least one light emitting component, configured to emit a light ray to the key cap; and a shield, covering the light emitting component, where there is a gap between the shield and the light emitting component, and the shield is provided with a diffraction grating at a position where the light ray passes through the shield.

Exemplary embodiments provide a new type of sensor elevator assembly for testing the environment within a microbial growth cassette, and techniques for using the assembly. The sensor elevator may support various types of sensors, such as oxygen or carbon dioxide probes or temperature sensors. In some embodiments, the elevator assembly includes a unique float mechanism in the form of a linear slide and spring system that allows the elevator assembly to be controlled very precisely and provides some cushioning in the event that the sensor makes contact with the optical lid. Thus, the impact and sustained forces exerted on the cassette can be reduced or eliminated. This helps to mitigate the risks of fiber optic damage or cassette misalignment due to excess force exerted during sensing.

Exemplary embodiments provide a new type of sensor elevator assembly for testing the environment within a microbial growth cassette, and techniques for using the assembly. The sensor elevator may support various types of sensors, such as oxygen or carbon dioxide probes or temperature sensors. In some embodiments, the elevator assembly includes a unique float mechanism in the form of a linear slide and spring system that allows the elevator assembly to be controlled very precisely and provides some cushioning in the event that the sensor makes contact with the optical lid. Thus, the impact and sustained forces exerted on the cassette can be reduced or eliminated. This helps to mitigate the risks of fiber optic damage or cassette misalignment due to excess force exerted during sensing.