A non-contact method of measuring an insertion loss of a DUT connector is disclosed. The DUT connector has a first ferrule with a first optical fiber and a first end face. The method utilizes a reference connector having a second ferrule with a second optical fiber and a second end face. The method includes: axially aligning the first and second ferrules so that the first and second end faces are confronting and spaced apart to define a gap with an axial gap distance d; measuring values of the insertion loss between the first and second optical fibers for different gap distances d>0; and estimating a value for the insertion loss for a gap distance of d=0 based on the measured values of the insertion loss when d>0.

A non-contact method of measuring an insertion loss of a DUT connector is disclosed. The DUT connector has a first ferrule with a first optical fiber and a first end face. The method utilizes a reference connector having a second ferrule with a second optical fiber and a second end face. The method includes: axially aligning the first and second ferrules so that the first and second end faces are confronting and spaced apart to define a gap with an axial gap distance d; measuring values of the insertion loss between the first and second optical fibers for different gap distances d>0; and estimating a value for the insertion loss for a gap distance of d=0 based on the measured values of the insertion loss when d>0.

An optical measuring device includes: a stimulus value acquirer that receives light from a measurement target and continuously acquires intensity corresponding to a stimulus value at a regular time interval; a response characteristic acquirer that acquires an impulse response characteristic from a storage that stores the impulse response characteristic corresponding to a luminous stimulus response; and a hardware processor that performs digital filter processing on continuous data of stimulus value intensity acquired by the stimulus value acquirer by the impulse response characteristic acquired by the response characteristic acquirer to generate data on which the luminous stimulus response is superimposed.

An optical measuring device includes: a stimulus value acquirer that receives light from a measurement target and continuously acquires intensity corresponding to a stimulus value at a regular time interval; a response characteristic acquirer that acquires an impulse response characteristic from a storage that stores the impulse response characteristic corresponding to a luminous stimulus response; and a hardware processor that performs digital filter processing on continuous data of stimulus value intensity acquired by the stimulus value acquirer by the impulse response characteristic acquired by the response characteristic acquirer to generate data on which the luminous stimulus response is superimposed.

Disclosed herein is a method for determining at least one correction function for compensating for responsivity changes of at least one photodetector. The photodetector includes at least one photosensitive region and at least one readout electronics unit for reading out the photosensitive region. The method includes the following steps: a) determining at least one reference signal of the photodetector, wherein the photosensitive region is illuminated by optical radiation provided by at least one reference for determining the reference signal; b) determining at least one background signal level of the photodetector; and c) determining the correction function by using at least one evaluation unit.

Also disclosed herein are a method for determining at least one item of information on at least one measurement object, a photodetector and a spectrometer.

Disclosed herein is a method for determining at least one correction function for compensating for responsivity changes of at least one photodetector. The photodetector includes at least one photosensitive region and at least one readout electronics unit for reading out the photosensitive region. The method includes the following steps: a) determining at least one reference signal of the photodetector, wherein the photosensitive region is illuminated by optical radiation provided by at least one reference for determining the reference signal; b) determining at least one background signal level of the photodetector; and c) determining the correction function by using at least one evaluation unit.

Also disclosed herein are a method for determining at least one item of information on at least one measurement object, a photodetector and a spectrometer.