1. Selection requirements for chicken house sites (1) Topography and location: In the plain area, the terrain should be slightly elevated, flat, dry and of good soil quality. The south slope or the southeast slope should be no more than 25 degrees. The hillside area should be set on the south side of the slope. . (2) Sufficient water supply and good water quality: The amount of water supplied by the farm should be calculated based on the maximum amount of water supplied in summer. At this time, the amount of water consumed by the flock is about 3 to 4 times of the intake, and the water quality must meet the drinking water standards. (3) Electricity and transportation are convenient, but they should be far away from pollution sources such as villages, highways, chemical plants and veterinary stations. The coops should be separated by more than 100 meters. It is best to have a natural barrier, which is conducive to the control of the epidemic. 2, chicken house type and structure (1) Types of houses: There are three types: open, semi-open, and closed. (2) Basic requirements of the structure of the chicken house: 1 Chicken coop structure: It is best to use brick and wood structure or heat insulation material. If the roof is made of asbestos, it is required to open a ventilation building in the ridge every 12 meters, and the roof has a three-layer structure: The layers are asbestos tiles, the middle layer is straw, and the innermost layers are waterproof linoleum paper or color strip cloths. The bearing capacity of foundations, columns and roofs must meet the requirements for maximum windproof, flood control and snow protection in the area. 2 Foundation and ground: The ground of the coop should be 20-30 cm higher than the outside, and the foundation should be deep and strong. In the high and relatively humid groundwater areas, the foundation should be raised or paved under the ground; the ground cement, except Easy to wash and disinfect, but also to prevent rats. 3 Building size: According to the amount of 5,000 birds per house, the height from the eaves to the ground is 2.60.1 meters. The length of the house is not more than 60 meters and the span is not more than 9 meters. 4 Drainage Ditch: Set a drainage ditch (width 40 cm, depth 10 cm) 30 to 50 cm from the corner of the coop house. If the chicken house is built on a sloping land, a drainage ditch should be opened uphill. 5 Disinfection pool: At least one pedal disinfecting pool/basin and disinfection hand basin should be provided in front of each house (fixed foot disinfecting pool is made of cement, and the length is about 50cm, width is 30cm, and depth is 5cm). 6 Sports Ground: It requires good greening, no water accumulation, no weeds. Ball Lenses are commonly used to improve signal quality in fiber coupling applications, or for use in endoscopy or bar code scanning applications. Ball Lenses feature short back focal lengths to minimize the distance needed from the Ball Lens to the optical fiber.
Worldhawk can provide spherical ball lenses and half ball lenses in a range of substrates for performance in the ultraviolet to the NIR. Such as including H-K9L(N-BK7), Sapphire, CaF2, BaF2, ZnSe or custom materials upon request.
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Half-Ball (hemispherical) lenses are ideal for applications such as fiber communication,endoscopy, microscopy, optical pick-up devices,and laser measurement systems.
