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广大集邮爱好者均持有一把凸镜,用来放大观察邮票上的网络,以辩真伪和好次,而这种凸镜既大又重,跌落容易破碎,携带亦不方便。该发明采用高透明光学塑料制成平面放大镜,外形尺寸53×60×2.4mm,重量仅8克,可放在小口袋里,携带、使用十分方便,放大倍率为5～7倍,可充分满足集邮放大观察需要。我国集邮爱好者近3000万人,产品有巨大市场,亦是不可多得的旅游纪念品。
The vast number of philatelists all hold a convex mirror to enlarge the network on the postage stamps in order to distinguish between true and false. The convex mirrors are large and heavy. They are easily broken and easily carried. The invention adopts a high transparent optical plastic to make a flat magnifying glass, the external dimension is 53×60×2.4mm, and the weight is only 8 grams. It can be put in a small pocket and is convenient to carry and use. The magnification is 5-7 times, and can be fully satisfied. Philately to enlarge the observation needs. There are nearly 30 million philatelists in China, and there are huge markets for products. It is also a rare tourist souvenir.