Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises eight lens elements positioned in an order from an object side to an image side. Through controlling convex or concave shape of surfaces of the lens elements and satisfying at least one inequality, the optical imaging lens may shorten system length with a good imaging quality.

Abstract: An optical lens assembly, sequentially including a first lens element to a sixth lens element from a first side to a second side along an optical axis, is provided. The optical lens assembly satisfies the conditional expressions of V1+V2+V6?120.000 and EFL*Fno/D11t22?11.500. Furthermore, other optical lens element assemblies are also provided.

Abstract: An optical imaging lens including first, second, third, fourth, fifth and sixth lens elements sequentially along an optical axis from an object side to an image side is provided. The first to sixth lens elements each includes an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing imaging rays to pass through. The optical imaging lens has only the six lens elements and satisfies condition expressions of Li11t42/L42t62?2.400 and V3+V4+V5?120.000.

Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises eight lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may enlarge aperture stop and image height and sustain relative illumination.

Abstract: An imaging lens includes first, second, third, fourth, fifth and six lens elements arranged in order from an object side to an image side along an optical axis. Each of the lens element has a thickness along the optical axis. Two of thicknesses of the first to the fourth lens elements along the optical axis are the thickest and the second thickest among the abovementioned six lens elements, respectively.

Abstract: An optical imaging lens includes first to seventh lens elements sequentially arranged along an optical axis from an object side to an image side, and each including an object-side surface facing the object side and allowing an imaging ray to pass through and an image-side surface facing the image side and allowing the imaging ray to pass through. The first lens element has positive refracting power. A periphery region of the object-side surface of the fourth lens element is convex. The fifth lens element has positive refracting power. The sixth lens element has positive refracting power. An optical axis region of the object-side surface of the seventh lens element is convex. Lens elements of the optical imaging lens are only the seven lens elements described above. The optical imaging lens has at least one adjustable air gap.

Abstract: An optical imaging lens, sequentially including a first, second, third, and fourth lens elements along an optical axis from an object side to an image side, is provided. Each of the first to fourth lens elements includes an object-side surface facing the object side and allowing imaging rays to pass through, and an image-side surface facing the image side and allowing the imaging rays to pass through. An optical axis region of the object-side surface of the first lens element is convex. The second lens element is a glass lens element. The third lens element has negative refracting power. An optical axis region of the image-side surface of the fourth lens element is convex. Lens elements of the optical imaging lens are only the four lens elements, and the optical imaging lens further satisfies following conditional expressions: HFOV/TTL?15.000 degrees/mm and 0.500?|RLGmin|/TG.

Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises eight lens elements positioned in an order from an object side to an image side. Through controlling convex or concave shape of surfaces of the lens elements, the optical imaging lens may shorten system length with a good imaging quality.

Abstract: An optical lens assembly, including a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element sequentially along an optical axis from a first side to a second side, is provided. The optical lens assembly satisfies the conditional expression of D34/D12?2.600. Furthermore, other optical lens assemblies are also provided.

Abstract: An optical imaging lens, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, and a ninth lens element disposed in sequence from an object side to an image side along an optical axis. An optical axis region of the object-side surface of the second lens element is convex. The fourth lens element has positive refracting power, and a periphery region of the image-side surface of the fourth lens element is concave. A periphery region of the object-side surface of the fifth lens element is concave. The seventh lens element has positive refracting power.

Abstract: An optical imaging lens includes a first lens element to a ninth lens element from an object side to an image side along an optical axis and each lens element has an object-side surface and an image-side surface. A periphery region of the object-side surface of the fourth lens element is concave, an optical axis region of the image-side surface of the fourth lens element is convex, an optical axis region of the object-side surface of the seventh lens element is concave, an optical axis region of the image-side surface of the eighth lens element is concave, and an optical axis region of the object-side surface of the ninth lens element is concave. Lens elements included by the optical imaging lens are only nine lens elements described above. An Abbe number of the fifth lens element ?5 and an Abbe number of the ninth lens element ?9 satisfy ?5+?9?100.000.

Abstract: An optical imaging lens includes a first lens element to a ninth lens element along an optical axis and each has an object-side surface and an image-side surface. A periphery region of the object-side surface of the fourth lens element is concave, an optical axis region of the object-side surface of the sixth lens element is concave, an optical axis region of the object-side surface of the seventh lens element is convex, and an optical axis region of the object-side surface of the ninth lens element is convex. Lens elements included by the optical imaging lens are only nine lens elements described above. G23 is an air gap between the second lens element and the third lens element along the optical axis and G34 is an air gap between the third lens element and the fourth lens element along the optical axis to satisfy (G23+G34)/IG23-G3412:3.000.

Abstract: An optical imaging lens, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element sequentially along an optical axis from an object side to an image side, is provided. Each lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. The second lens element has negative refracting power. An optical axis region of the object-side surface of the third lens element is concave. An optical axis region of the image-side surface of the fourth lens element is concave. An optical axis region of the object-side surface of the fifth lens element is concave. The seventh lens element has positive refracting power.

Abstract: An optical imaging lens including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element sequentially along an optical axis from an object side to an image side is provided. Each of the first lens element to the eighth lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. A periphery region of the object-side surface of the third lens element is concave, and a periphery region of the image-side surface of the third lens element is convex. Lens elements of the optical imaging lens are only the above-mentioned eight lens elements, and the optical imaging lens satisfies the condition of D11t62/D71t82?2.400.

Abstract: An optical imaging lens includes a first lens element to an eighth lens element from an object side to an image side along an optical axis. The third lens element has positive refracting power, and a periphery region of the object-side surface of the third lens element is concave, an optical axis region of the object-side surface of the fifth lens element is concave, a periphery region of the object-side surface of the eighth lens element is convex, and an optical axis region of the image-side surface of the eighth lens element is concave. Lens elements included by the optical imaging lens are only eight lens elements described above to satisfy (EFL+AAG)/ALT?2.200.

Abstract: An optical imaging lens includes a first lens element to a seventh lens element; each lens element has an object-side surface and an image-side surface. A periphery region of the image-side surface of the third lens element is concave, an optical axis region of the object-side surface of the fourth lens element is concave, the fifth lens element has negative refracting power, an optical axis region of the object-side surface of the seventh lens element is convex, and a periphery region of the object-side surface of the seventh lens element is concave. Lens elements included by the optical imaging lens are only seven lens elements described above to satisfy 2.200?(T1+D42t72)/(Fno*D12t32) and 115.000??3+?4+?5.

Abstract: An optical imaging lens includes a first lens element to a seventh lens element. The first lens element has positive refracting power, the second lens element has negative refracting power, a periphery region of the object-side surface of the third lens element is concave, an optical axis region of the image-side surface of the third lens element is convex, an optical axis region of the object-side surface of the fifth lens element is convex, an optical axis region of the image-side surface of the sixth lens element is concave, an optical axis region of the object-side surface of the seventh lens element is convex, and a periphery region of the image-side surface of the seventh lens element is convex. Lens elements included by the optical imaging lens are only the seven lens elements mentioned above, and the following conditions: D31t72/(Fno*D11t22)?2.300 and D32t62*Fno/D62t72?3.500 are satisfied.

Abstract: An optical imaging lens may include a first, a second, a third, a fourth, a fifth, a sixth, and a seventh lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of lens elements, the optical imaging lens may provide great resolution along with enlarged aperture stop and image height.

Abstract: An optical imaging lens includes a first lens element to a sixth lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. An optical axis region of the image-side surface of the first lens element is convex, a periphery region of the object-side surface of the third lens element is convex, an optical axis region of the image-side surface of the third lens element is convex, an optical axis region of the image-side surface of the fifth lens element is concave, the sixth lens element has positive refracting power, and a periphery region of the image-side surface of the sixth lens element is convex. The optical imaging lens has only the above six lens elements with refractive power, and the optical imaging lens satisfies the following conditions: ?3+?4+?5?130.000.

Abstract: A detection system and method for simultaneously determining the concentration of ammonium and nitrate/nitrite in samples such as surface water and wastewater. The detection system and method herein can further comprise a cleaning loop and a calibration loop and can be used in situ and over long periods of time without replacement or frequent maintenance and upkeep.