Multifunctional micro sensor system
A measurement device relates to a Halios system for measuring an optical transmission path, in which at least one receiver and a compensation transmitter are optically separated from each other by an optical barrier in such a matter that a direct irradiation of said receiver by said compensation transmitter is not possible. Said compensation transmitter and a transmitter are of the same type and/or have at least a common electric optical working point in an optical working point. Said optical barrier has a compensation path, characterized by a compensation window, which attenuates the light of the compensation transmitter before it hits the receiver in such a manner that the compensation transmitter and said transmitter are operated at least in an optical working point by a controller in said identical electro-optical working point.
1. A device comprising:
a housing defining a first cavity;
a first transmitter transmitting a first transmitter signal along a first transmission path to a receiver based on a first input signal;
a second transmitter transmitting a second transmitter signal along a second transmission path to the receiver based on a second input signal;
the receiver disposed in the first cavity configured to generate a receiver output signal based at least in part on receiving the first and second transmitter signals as modified, respectively, by the first transmission path and the second transmission path;
a controller configured to generate, based at least in part on the receiver output signal, one or both of the first and second input signals, such that substantially all of the first input signal is removed from the receiver output signal; wherein:
the modification of the first transmitter signal along the first transmission path includes a value of a characteristic of the first transmission path to be measured;
for at least one value of the characteristic to be measured, a respective strength of the first and second transmitter signals as received by the receiver, is substantially the same, and, simultaneously, an electrical operating point for each of the first and second transmitters, characterized by at least one of a respective electrical operating power, a respective electrical operating current and a respective electrical operating voltage, is substantially the same; and
the second transmission path is fully enclosed within the device and includes a first optical barrier for blocking a direct irradiation of the receiver by the second transmitter, the optical barrier including a first window.
2. The device of claim 1 , wherein the controller is further configured to generate a controller output signal including a representation of the value of the characteristic to be measured.
3. The device of claim 1 , further comprising a generator, wherein:
one of the first and second input signals is generated by the generator, and the other of the first and second inputs signals is generated by the controller, based in part on the one of the first and second input signals.
4. The device of claim 1 , further comprising a generator, wherein:
the controller generates, based in part on the generator signal, both of the first and second input signals.
5. The device of claim 1 , wherein the first window is dimensioned, such that at a predetermined value of the characteristic to be measured, the electrical operating point for each of the first and second transmitters, characterized by at least one of a respective electrical operating power, a respective electrical operating current and a respective electrical operating voltage, is substantially the same.
6. The device of claim 1 , wherein the first window includes a first filter.
7. The device of claim 1 , wherein:
the optical barrier forms one wall of the first cavity;
the housing defines a second cavity adjacent to the first cavity, one side of the second cavity being formed by the first optical barrier; and
the second transmitter is disposed within the second cavity.
8. The device of claim 7 , wherein one of the first cavity and the second cavity includes a reflector for directing the second transmitted signal toward the receiver.
9. The device of claim 1 , further comprising a second barrier disposed such that a direct irradiation of the receiver by the first transmitter is substantially blocked.
10. The device of claim 9 , wherein:
the first transmitter signal is received by the receiver from an object in a predefined area relative to the device; and
the characteristic to be measured includes a position of the object relative to the device.
11. The device of claim 10 , wherein:
the first transmitter signal as received by the receiver includes a reflection of the first transmitted signal.
12. The device of claim 10 , wherein:
the first transmitter signal as received by the receiver includes a fluoresced signal from the object.
13. The device of claim 10 , wherein the second barrier includes a second window, permitting a direct irradiation of the object located in the predefined area by the first transmitter.
14. The device of claim 10 , wherein the first cavity includes a third window permitting a direct irradiation of the receiver from the object in the predefined area.
15. The device of claim 1 , wherein:
the first transmitter exhibits a first strength of the first transmitted signal for a first electrical operating condition, the first electrical operating condition including at least one of a first operating power, a first operating voltage and a first operating current;
the second transmitter exhibits a second strength of the second transmitted signal for a second electrical operating condition, the second electrical operating condition including at least one of a second operating power, a second operating voltage and a second operating current; and
the first strength differs by less than 10% from the second strength under a condition that the first electrical operating condition matches the second operating condition.
16. The device of claim 12 , further comprising:
a second filter arranged such the first transmitter signal received by the receiver from the object in the predefined area passes through and is modified by the second filter; wherein:
a first wavelength of the first transmitted signal is different from a second wavelength of light of the second transmitted signal, and the second filter exhibits:
a transmissivity of at least 75% for a center wavelength of sensitivity for the receiver;
a reflectivity of at most 25% for the first wavelength of the first transmitted signal;
a transmissivity of at most 25% for the second wavelength of the second transmitted signal; and
an absorption factor of at least 75% for the second wavelength of the second transmitted signal.
17. The device of claim 1 , further comprising:
a lens associated with one of the first transmitter and the receiver, wherein a focal point of the lens is displaced relative to an optical axis of the associated one of the first transmitter and the receiver.
18. The device of claim 1 , further comprising:
a first die paddle associated with the receiver; and
a second die paddle associated with the second transmitter; wherein
the first die paddle is tilted toward the second die paddle.
19. The device of claim 1 , further comprising:
a first die paddle associated with the receiver; wherein:
the receiver is attached with glue to the first die paddle, the glue being absorbent for wavelength ranges, which can pass the receiver, the receiver being formed of a photodiode.
20. The device of claim 1 , comprising:
a second filter arranged such that the first transmitter signal received by the receiver from the object in the predefined area passes through and is modified by the second filter; wherein:
a first wavelength of the first transmitted signal is different from a center wavelength of sensitivity of the receiver, and the second filter exhibits:
a transmissivity of at least 75% for the center wavelength of sensitivity of the receiver;
a transmissivity of at most 25% for the first wavelength of the first transmitted signal; and
an absorption factor of at least 75% for the first wavelength of the first transmitted signal.