Ophthalmic perimeter MD-820A

static perimetrytabletop

Stimulus light source: LED; single alternating working mode; emission power no higher than 3.66mW during its operation, maintenance, repair or under faulty conditions. Stimulus light luminance: 0.5 ~ 318nt (1.6 ~ 1000asb) Stimulus light brightness level: 15 levels, each level with 2dB Brightness error of each indicator:±20%; Background light luminance: 0.02 cd/m2,±20% Dimension and shape of stimulus indicator: circular indicator with diameter of 2mm, nominal solid angle: Ω = 2.88 × 10-5, tolerance ± 15% Time characteristic for the appearance of stimulus indicator Stimulus lasting time: 0.1s, 0.2s, 0.5s selectable with tolerance of ±20% Stimulus interval time: 0.5s, 1s, 2s selectable with tolerance of ±20% Distance between chinrest center and screen center: 330mm±16mm Chinrest moving range: up-down direction ≥35mm and horizontal direction≥15mm.