Telescope and microscope experiment

Experiment 30 Telescope and microscope

【Purpose requirement】

1. Understand the basic structure and working principle of magnifying glass, microscope and telescope;

2. Learn to assemble telescopes and microscopes, and master their usage;

3. Understand the viewing angle magnification and measurement method of the visual aid instrument.

【Experimental Principle】

The imaging optical instruments can be basically divided into real image or virtual image categories: real image optical instruments such as cameras, slide projectors, movie projectors, projectors, etc .; and the latter optical instruments such as magnifiers, microscopes, telescopes etc Virtual images are directly observed with the eyes, so they are also called visual aids.

【Experiment content】

1. Design experimental method to measure the focal length of the convex lens and record it;

2. Assemble a simple microscope on the optical bench;

3. Assemble a simple telescope on the optical bench;

4. Measure the viewing angle magnification of the self-organizing telescope by comparison method;

5. Use the formula method to measure the magnification of the viewing angle of the finished telescope when observing distant objects.

【Instruments】

Serial number

equipment name

Model / Specification

Unit price (yuan)

Remarks

1

Teaching optical bench

1000 × 80 × 35mm

1000

Compatible with other experiments

2

Slider 1

Fixed socket (3)

600

3

Slider 2

With lateral displacement,

Moving range ± 4mm (2pcs)

4

Extended light source

12V, 21W

380

5

Two convex lenses

Φ40, f50, 250

720

6

Object screen with subtle features

80 × 60mm

7

Frosted glass screen

80 × 60mm

8

Paper ruler

Φ10mm

9

Cross-hair diaphragm

Φ1.2 ～ Φ20

10

Flat mirror

Φ36 × 4, dielectric coating

11

Reading microscope

JXD-B / 0-50mm, 0.01mm

1800

12

telescope

f100mm, 6X, 120mm

1400