AUTOSAMPLERS AND ANALYTIC SYSTEMS AND METHODS INCLUDING SAME
An autosampler includes a carrier for receiving a plurality of sample containers each having a top end and a visible indicium. The visible indicia are located below a top plane defined by the top ends. The autosampler includes: an optical sensor configured to read the visible indicia and to generate a corresponding output signal, and having a line of sight; a controller configured to receive the output signal; and a sampling system to withdraw a sample from the sample containers. The autosampler is operative to relatively move the optical sensor and/or the carrier such that the line of sight intersects the visible indicium of a selected one of the sample containers, wherein the line of sight extends: downward from a height above the height of the top plane; at an oblique angle to the top plane; and through a gap between the selected sample container and an adjacent sample container.
1 . An autosampler comprising:
a carrier for receiving a plurality of sample containers, the sample containers each having a top end and a visible indicium;
wherein:
the top ends of the sample containers define a top plane; and
the visible indicia are located below the top plane;
an optical sensor configured to read the visible indicia and to generate an output signal corresponding thereto, the optical sensor having a line of sight;
a controller configured to receive the output signal; and
a sampling system to withdraw a sample from at least one of the sample containers;
wherein the autosampler is operative to move the optical sensor and/or the carrier relative to the other such that the line of sight intersects the visible indicium of a selected one of the sample containers, wherein the line of sight extends:
downward from a height above the height of the top plane;
at an oblique angle to the top plane; and
through a gap between the selected sample container and an adjacent sample container.
2 . The autosampler of claim 1 wherein:
the carrier includes a plurality of seats; and
the sample containers are disposed in respective ones of the seats.
3 . The autosampler of claim 1 wherein the visible indicium of each sample container is located on a sidewall of a top portion of the sample container.
4 . The autosampler of claim 1 wherein the oblique angle defined between the line of sight and the top plane is in a range of from about 30 to 60 degrees.
5 . The autosampler of claim 1 wherein the sample containers are configured in the carrier in an array including rows of the sample containers, and the rows each define a respective row axis.
6 . The autosampler of claim 5 wherein:
the line of sight intersecting the visible indicium of the selected sample container lies in a line of sight plane that is orthogonal to the top plane; and
the autosampler is operative to move the optical sensor and/or the carrier relative to the other such that:
the row axis of the row including the selected sample container extends at an oblique angle to the line of sight plane; and
the line of sight intersecting the visible indicium of the selected sample container extends through a gap between the selected sample container and an adjacent sample container located in a row adjacent the row including the selected sample container.
7 . The autosampler of claim 6 wherein the oblique angle defined between the row axis of the row including the selected sample container and the line of sight plane is in a range of from about 30 to 60 degrees.
8 . The autosampler of claim 6 wherein the autosampler is operative to move the optical sensor and/or the carrier relative to the other such that the line of sight intersecting the visible indicium of the selected sample container extends through a gap between the selected sample container and an adjacent sample container located in a row adjacent the row including the selected sample container.
9 . The autosampler of claim 5 wherein the autosampler is operative to move the optical sensor and/or the carrier relative to the other such that the line of sight intersecting the visible indicium of the selected sample container extends through a gap between the selected sample container and an adjacent sample container located in the row including the selected sample container.
10 . The autosampler of claim 9 wherein:
the carrier includes a plurality of seats;
the sample containers are disposed in respective ones of the seats; and
the gap is located over a seat in the row including the selected sample container that does not contain a sample container.
11 . The autosampler of claim 1 wherein:
the sampling system includes a sampling probe configured to withdraw a sample from a sample container; and
the autosampler is operative to position the sampling probe over the sample container when the line of sight of the optical sensor intersects the visible indicium of the selected sample container.
12 . The autosampler of claim 11 including a positioning system configured to move the optical sensor together with the sampling probe relative to the carrier.
13 . The autosampler of claim 1 including a mirror, wherein the line of sight extends from the visible indicium on the selected sample container to the mirror, and the mirror is configured to reflect an image of the visible indicium on the selected sample container to the optical sensor.
14 . The autosampler of claim 1 wherein the controller is configured to programmatically and automatically determine from an output signal of the optical sensor that a location in the carrier for holding a sample container does not contain a sample container.
15 . The autosampler of claim 1 wherein the controller is configured to programmatically and automatically determine a type of the carrier from an output signal of the optical sensor.
16 . The autosampler of claim 1 wherein the controller is configured to programmatically and automatically identify each of the visible indicia.
17 . The autosampler of claim 1 wherein the visible indicia are barcodes.
18 . The autosampler of claim 1 wherein each sample container includes multiple copies of the visible indicium distributed about a circumference of the sample container.
19 . The autosampler of claim 1 wherein:
the autosampler includes a reference marker; and
the controller is operative to determine whether a sample container is present in a target container receiving region of the carrier by:
positioning the reference marker in the target container receiving region;
acquiring an image of the container receiving region with the reference marker disposed in the target container receiving region; and
determining from the acquired image whether the reference marker is obfuscated in the acquired image by a sample container disposed in the target container receiving region.
20 . The autosampler of claim 19 wherein the reference marker is a sampling probe forming a part of the sampling system and configured to withdraw a sample from a sample container.
21 . A method for sampling, the method comprising:
providing a plurality of sample containers each having a top end and a visible indicium;
providing an autosampler including:
a carrier holding the plurality of sample containers such that:
the top ends of the sample containers define a top plane; and
the visible indicia are located below the top plane;
an optical sensor configured to read the visible indicia and to generate an output signal corresponding thereto, the optical sensor having a line of sight;
a controller configured to receive the output signal; and
a sampling system to withdraw a sample from at least one of the sample containers;
using the autosampler, moving the optical sensor and/or the carrier relative to the other such that the line of sight intersects the visible indicium of a selected sample container, wherein the line of sight extends:
downward from a height above the height of the top plane;
at an oblique angle to the top plane; and
through a gap between the selected sample container and an adjacent sample container;
using the optical sensor, reading the visible indicia and generating an output signal corresponding thereto to the controller; and
withdrawing a sample from the selected sample container.
22 . The method of claim 21 , further comprising:
providing an analytical instrument; and
transferring the withdrawn sample to the analytical instrument.
23 . The method of claim 21 , wherein:
the sample containers are configured in the carrier in an array including rows of the sample containers, and the rows each define a respective row axis;
the line of sight intersecting the visible indicium of the selected sample container lies in a line of sight plane that is orthogonal to the top plane; and
the method includes, using the autosampler, moving the optical sensor and/or the carrier relative to the other such that:
the row axis of the row including the selected sample container extends at an oblique angle to the line of sight plane; and
the line of sight intersecting the visible indicium of the selected sample container extends through a gap between the selected sample container and an adjacent sample container located in a row adjacent the row including the selected sample container.
24 . An optical reader system comprising:
a carrier for receiving a plurality of units, the units each having a top end and a visible indicium;
wherein:
the top ends of the units define a top plane; and
the visible indicia are located below the top plane;
an optical sensor configured to read the visible indicia and to generate an output signal corresponding thereto, the optical sensor having a line of sight; and
a controller configured to receive the output signal; and
wherein the optical reader system is operative to move the optical sensor and/or the carrier relative to the other such that the line of sight intersects the visible indicium of a selected one of the units, wherein the line of sight extends:
downward from a height above the height of the top plane;
at an oblique angle to the top plane; and
through a gap between the selected unit and an adjacent unit.
25 .- 47 . (canceled)