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在生物实验课上,我无意将玻璃切片放在打开的投影仪上,玻片被投在幕布上,并且被放大了许多。当时我就想,能不能增大投影的放大倍数,使玻片能清晰地投在幕布上,让全体学生都能看清楚呢?这样既提高了普通投影仪的功能,也使上生物课方便多了。我先用一些显微镜头和放大镜,在投影仪
In the biological experiment class, I didn’t intend to place the glass slice on the open projector. The slide glass was cast on the curtain and was enlarged a lot. At that time, I thought, could I increase the magnification of the projection so that the slide could be clearly projected on the screen so that all students could see it clearly? This would not only improve the function of ordinary projectors, but also make it convenient for biology classes. too much. I first use some microscopes and magnifiers in the projector