用书写投影机进行水平装置的演示投影,由于效果好,应用已很普遍。如果将投影机侧倒放后来投影那些只能竖放的演示实验,虽然投影后视野开阔,清晰明显;但因产生的是倒像,投影的现象和人们的视觉习惯完全颠倒,使人感到十分别扭和扫兴。如能按本文方法,制作一个附加装置,就可将 Descriptive projection of a horizontal device using a writing projector is very common due to its good effect. If you project the projector side upside down and then project those demonstration experiments that can only be placed vertically, although the vision after the projection is wide and clear, but because of the inverted image, the projection phenomenon and people’s visual habits are completely reversed, making people feel very Awkward and disappointing. If you can make an additional device according to this method, you can