NLS-Glossary

Output quantity current or voltage signal of a measurement system, continuous in value and time, as a response to the measured quantity. The output supplies a current or voltage value proportional to the distance of the object.

is a interface for analog inputs or outputs.                                                                                                                                                                                                                        

The analog rise time is the time during which output voltage may climb from 10% to 90%  (or equivalently 0.1 and 0.9).
The rise time is an essential parameter in analog and digital systems. It describes the time taken for the output to rise from one level to another in an analog system, which has many real-world implications. The rise time tells us how long a signal spends in the intermediate state between two valid logic levels in a digital system.

An analog signal is any continuous signal for which the time-varying feature of the signal is a representation of some other time-varying quantity, i.e. Sensor whose signal is displayed as a continuously varying analog value (e.g. 0...12 V, 2...30 mA).

is the angle at which light is emitted from the sensor’s emitter, or scanned by the receiver.
The angular aperture of a lens is the angular size of the lens aperture as seen from the focal point : is the diameter of the aperture. In a medium with an index of refraction close to 1, such as air, the angular aperture is approximately equal to twice the numerical aperture of the lens.

Most units of angular measurement are defined such that one turn (i.e. one full circle) is equal to n units, for some whole number n. The two exceptions are the radian (and its decimal submultiples) and the diameter part.
Angular Measurement Circles are divided into 360 equal parts, each being a degree. Each of these degrees can be evenly divided into 60 equal parts. These parts are called minutes. The unit of degree can also be divided into either decimal or fractional parts and is referred to as decimal degrees or fractional degrees.