manufacturers supply exquisite dragon handle series gift magnifying glass | diameter 50 60 70 80 90mm

manufacturers supply exquisite dragon handle series gift magnifying glass | diameter 50 60 70 80 90mm | price is 70

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manufacturers supply exquisite dragon handle series gift magnifying glass | diameter 50 60 70 80 90mm | price is 70

厂家供应精美龙柄系列礼品放大镜|直径50 60 70 80 90MM|标价为70

EXW Price: Min. order:

¥12.5
≥200/piece

¥12.0
≥400/piece

¥11.8
≥600/piece

200 piece

Exchage Rate 1 CNY ≈ 0.142 USD
Stock num 999999 piece

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Supplier

顺宏光学

Description

[尺寸]：50mm/60mm/70mm/80mm/90mm/

[使用方法]：右手持放大镜，使得镜头与视线平行，（距离成像清楚且倍数最大时最佳）左手拿着需要观察的物体对着光源慢慢靠近镜头，在移动被鉴定物体时候找最适合的观察位置，效果就十分明显了。

[成像原理]：表面为曲面的玻璃或其他透明材料制成的光学透镜可以使物体放大成像，光路图如图1所示。位于物方焦点F以内的物AB，其大小为y，它被放大镜成一大小为y'的虚像A'B'。
放大镜的放大率
Γ=250/f'
式中250--明视距离，单位为mm
f'--放大镜焦距，单位为mm
该放大率是指在250mm的距离内用放大镜观察到的物体像的视角同没有放大镜观察到的物体视角的比值。

温馨提示：以上标价是根据直径70龙柄为基础。想了解同款其他产品价格，请直接与我们联系。

Update time：20220307234118