【Scope of application】 It is mainly used for visual field testing of face masks, respirators, etc. It is suitable for respirator manufacturers, quality supervision, scientific research, wearing and other units. 【Relevant Standards】

GB/T 32610-2016GB 2626-2006

【Scope of application】: It is mainly used for visual field testing of face masks, respirators, etc. It is suitable for respirator manufacturers, quality supervision, scientific research, wearing and other units. [Meet the standard]: GB/T 32610-2016 GB 2626-2006 [Instrument features]: 1. The overall equipment consists of a semi-circular arc bow, a recording device, a stand, and a test head mold. 2. Semicircular arc bow: the radius (300-340) mm can rotate around the horizontal radius plane passing through the middle point of 0°, and the two sides extend to the 90° arc bow every 5° from 0°, equipped with a sliding white optoscope. 3. Recording device: The recording needle is linked to the optotype through components such as the axle wheel, and the orientation and angle of the optotype are recorded on the field of view drawing accordingly. 4. Stand: used to support the semicircular arc bow and fixed recording device. 5. Test head mold: a standard head mold, the head mold is equipped with a small light bulb in the two eye holes, and the bulb position and head mold placement position are in accordance with the requirements of standard GB 2890. The position of the test head mold on the workbench should be so that the left and right eyes are placed at the center of the semicircular arc arch respectively, and look directly at its “0” point. 【Technical Parameters】: 1、Semicircular arc bowRadius:335mm。 2. Left and right field of vision: ≤120°。 3. Bulb distance: the vertex of the bulb is connected after the midpoint of the two eyes (7±0.5).