Guide apparatus and detector having the same

An apparatus for detecting microdroplets flowing within a plate, the apparatus comprising:

• a plate comprising a first plate and a second plate,
• wherein the plate has a droplet-inlet, at least one fluid-inlet, and an outlet,
• wherein the plate comprises a first microchannel, at least one second microchannel and a third microchannel,
• wherein the first microchannel, at least one second microchannel and a third microchannel meet in a junction,
• wherein the first microchannel extends between the droplet-inlet and the junction,
• wherein the at least one second microchannel extends between the at least one fluid-inlet and the junction,
• wherein the third microchannel extends between the outlet and the junction, and
• wherein the first plate has a first groove, at least one second groove and a third groove, and the first plate and the second plate are joined together, forming the plate,
• a fluid tank configured to store fluid;
• a droplet tank configured to store microdroplets;
• a droplet pump configured to provide hydraulic pressure to transfer the stored microdroplets into the plate through the droplet-inlet;
• a fluid pump configured to provide hydraulic pressure to transfer the stored fluid into the plate through the at least one fluid-inlet;
• and
• a light detector comprising a light source, which is configured to detect the microdroplets flowing in the plate by using light emitted from the light source,
• wherein the second plate is optically transparent,
• wherein the light detector is located on a side of the second plate rather than the first plate allowing the light emitted from the light detector to pass through the second plate instead of the first plate, and
• wherein the light detector is positioned between the junction and the outlet enabling detection of the microdroplets after the microdroplets meet the fluid in the plate and are sufficiently separated between each other.