CN201196847Y - Convex lens imaging principle rule demonstration instrument for teaching - Google Patents

Abstract

The utility model relates to a convex lens imaging principle and regulation demonstrator for teaching, in particular to the convex lens imaging principle and regulation demonstrator equipment for teaching. In the demonstrator, both ends of a picture board are connected with a support base and a support rod, the support rod is sleeved with a light source bracket, a convex lens and a light screen, the upper end of the light source bracket is connected with a steel wire, the lower end of the light source bracket is connected with a light source bulb, a light cap is connected with an adjusting brightness controller and a power plug, the steel wire, a position line, a focal distance F and a focal distance 2f are arranged on the picture board, and the position line, the focal distance F and the double focal distance 2f of the convex lens are also arranged on the picture board, a parallel line of a primary optical axis crosses the center of the position line o the convex lens, light rays which are parallel to an overfocus of the primary optical axis cross the position line of the convex lens, the primary optical axis and the steel wire, and the support rod on the support base is connected with and fixed on the back surface of the picture board. The demonstrator has the advantages of simple structure, convenient operation and clear image, and can help students observe the convex lens imaging principle and regulation and strengthen memory of the students.

Description

Teaching convex lens image-forming principle rule demonstrator

Technical field:

The utility model relates to a kind of teaching with convex lens image-forming principle rule demonstrator, particularly imparts knowledge to students with convex lens image-forming principle and rule demonstration instrument equipment.

Background technology:

At present, do not impart knowledge to students in the prior art with convex lens image-forming principle rule demonstration instrument, its defective is to rely on teacher's explanation and diagram to help the student to understand convex lens image-forming principle rule, and the student is difficult to understand convex lens image-forming principle rule, and is easy to absurd note; Bothersome when consequently causing expense of instruction, the student does not still quite understand, and gets half the result with twice the effort.

Summary of the invention:

The purpose of this utility model provides a kind of teaching convex lens image-forming principle rule demonstrator, and it is to adopt light source bulb to slide on pictute plate and support bar, and light passes through pictute plate epirelief lens imaging on optical screen; Schematic diagram then by steel wire be parallel to that the ray intersection of overfocus is shown as picture behind the primary optical axis; The slip light source bulb can show imaging law continuously continuously, helps observation of students demonstration convex lens image-forming principle and rule, strengthens student's memory.

The utility model teaching takes following technical scheme to realize with convex lens image-forming principle rule demonstrator, it is to be made of light source bulb and pictute plate and convex lens and optical screen, the pictute plate two ends connect supporting seat and support bar, be nested with light source bracket and convex lens and optical screen on the support bar, the light source bracket upper end connects steel wire, the light source bracket lower end connects light source bulb, lamp holder connects regulates brightness controller and attaching plug, the position line and focal point F and two times of focal length 2f of convex lens are set on pictute plate, the parallel lines of a primary optical axis of center intersection on the position line of convex lens, be parallel to the light of primary optical axis overfocus and the position line of convex lens and intersect with primary optical axis and steel wire, the supporting seat upper support bar is connected the back side of pictute plate and fixes.

The utility model teaching is simple in structure with the effect of convex lens image-forming principle rule demonstrator, easy to operate, clear picture helps observation of students demonstration convex lens image-forming principle and rule, be convenient to observation of students and grasp convex lens image-forming principle rule, strengthen student's memory.

Description of drawings:

The utility model teaching will describe in further detail in conjunction with the accompanying drawings with convex lens image-forming principle rule demonstrator.

Accompanying drawing is the structural representation of the utility model teaching with convex lens image-forming principle rule demonstrator.

1---attaching plug 2---controller 3---light source bulb 4---parallel lines 5---supporting seat 6---support bar 7---light source bracket 8---steel wire 9---the position line 10---convex lens 11---light 12---optical screen 13---supporting seat 14---support bar 15---pictute plate

Embodiment:

With reference to accompanying drawing, the utility model teaching convex lens image-forming principle rule demonstrator, it is to be made of with convex lens 10 and optical screen 12 light source bulb 3 and pictute plate 15, pictute plate 15 two ends connect supporting seat 5 and support bar 6, be nested with light source bracket 7 and convex lens 10 and optical screen 12 on the support bar 6, light source bracket 7 upper ends connect steel wire 8, light source bracket 7 lower ends connect light source bulb 3, lamp holder connects regulates brightness controller 2 and attaching plug 1, the position line 9 and focal point F and two times of focal length 2f of convex lens 10 are set on pictute plate 15, the parallel lines 4 of a primary optical axis of center intersection on the position line 9 of convex lens 10, be parallel to the light 11 of primary optical axis overfocus and the position line 9 of convex lens 10 and intersect with primary optical axis and steel wire 8, supporting seat 13 upper support bars 14 are connected the back side of pictute plate 15 and fix.

The utility model teaching embodiment of convex lens image-forming principle rule demonstrator, during demonstration, attaching plug 1 is inserted in the supply socket, open and regulate brightness controller 2, light source bulb 3 is slided on pictute plate 15 and support bar 6, the light that light source bulb 3 sends, by convex lens 10 back imagings, mobile optical screen 12 receives distinct image; The schematic diagram side by steel wire 8 be parallel to behind the primary optical axis light 11 of overfocus and intersect and be shown as picture; Slip light source bulb 3 can show imaging law continuously continuously; When light source bulb 3 is between the position line 9 of focal point F and convex lens 10, steel wire 8 be parallel to that the light 11 of overfocus is not intersecting behind the primary optical axis, steel wire 8 is intersected with the reverse extending line that is parallel to the light 11 of overfocus behind the primary optical axis behind the reverse extending left, form a upright amplification virtual image, help observation of students demonstration convex lens 10 image-forming principles and rule, strengthen student's memory.

Claims (1)

1. a teaching is with convex lens image-forming principle rule demonstrator, it is to be made of with convex lens (10) and optical screen (12) light source bulb (3) and pictute plate (15), it is characterized in that pictute plate (15) two ends connect supporting seat (5) and support bar (6), be nested with light source bracket (7) and convex lens (10) and optical screen (12) on the support bar (6), light source bracket (7) upper end connects steel wire (8), light source bracket (7) lower end connects light source bulb (3), lamp holder connects regulates brightness controller (2) and attaching plug (1), and supporting seat (13) upper support bar (14) is connected the back side of pictute plate (15) and fixes.

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