Abstract: A method and device for detecting urea are provided. The method for detecting urea includes the following steps. A derivatization reagent reacts with a sample to obtain a mixture, wherein a reaction time period for reacting urea in the sample with the derivatization reagent to form a derivative product is controlled. The derivative product is separated from the mixture. The amount of separated derivative product is analyzed to determine the concentration of urea in the sample.

Abstract: An optical waveguide ribbon includes a base layer integrated with a plurality of parallel optical cores. The optical waveguide ribbon includes a first surface and a second surface opposite to the first surface. The optical cores extend along a length direction and arrange along a width direction. A first positioning portion is exposed on the first surface with a given shape and a second positioning portion is exposed on the second surface and has a positioning dimension in width according to the given shape of the first positioning portion.

Abstract: A method for producing an optical waveguide includes following steps: firstly, providing a substrate and coating resins on the substrate to form a clad; secondly, providing a container filled with waveguide material and inject the waveguide material through a nozzle of the container to form a shape needed on the clad; thirdly, shining UV lights on the waveguide material to harden the waveguide material to form the waveguide. This new method uses less waveguide material and simplifies the steps.

Abstract: A heat deflection testing equipment (10) for measuring tolerance of a sample (60) includes a temperature controlling case (30) and an optical sensor (20). The case includes a base (40) and a cover (50). The case has a carrier (41) defining a convective chamber (42) and a partition (44). The partition and the cover jointly define a heating chamber (49). An exhaust hole (440) communicating with the heating chamber and the convective chamber is on the partition. A sample carrier (46) has a datum plane (462). A number of air tubes (48) are set around the sample carrier with openings facing the sample. Incident beams (200, 202, 204) from the sensor are projected on the datum plane and the sample. Reflex beams (201, 203, 205) are reflected from the datum plane and the sample. The geometric tolerance can be measured by analyzing the incident beams and the reflex beams.

Abstract: A heating geometric measure equipment (10) for measuring geometric tolerance of a sample (60) under heating atmosphere. The measure equipment (10) includes a temperature controlling case (30) and an optical sensor (20). The case (30) includes a base (40) and a cover (50) having a window (500) clipped on the case (30). The case (30) has a supporting section (41) defining a convective chamber therein and a partition (44) on the supporting section (41). The partition (44) and the cover (50) jointly define a heating chamber (49). A vent (402) communicating with the heating chamber (49) and the convective chamber (42) is defined on the partition (400). A sample carrier (46) having a datum plane (462) on an upper surface thereof is provided above the vent (402). A number of air tubes (48) are set around the sample carrier (46) with openings facing the sample carrier (46). The sensor (20) is horizontally movable above the cover (60) of the case (30).