Mitutoyo MT-L Mounting Adapter

MT-L-adapter.scad

$fn = 100;

// For M3 inserts
insert_diameter = 4;
insert_height = 7;
insert_boder_spacing = 3;

lens_diameter = 35 + 0.1;
lens_height = 32 + 6;
distance_to_objective = 134 - lens_height;
SM2A31_internal_height = 7.9 - 3;
objective_tube_diameter = lens_diameter - 3;
adapter_diameter = lens_diameter + (insert_diameter + insert_boder_spacing*2)*2;

objective_clearance_tube_height = SM2A31_internal_height + distance_to_objective;
adapter_height = objective_clearance_tube_height + lens_height;

difference() {
    // Adapter body
    cylinder(h=adapter_height, d=adapter_diameter);

    // Lens body
    translate([0, 0, objective_clearance_tube_height])
        cylinder(h=lens_height, d=lens_diameter);

    // Objective clearance tube
    cylinder(h=objective_clearance_tube_height, d=objective_tube_diameter);

    // Insert holes
    for (insert_angle = [0, 90, 180, 270]) {
        insert_x_offset = (adapter_diameter - insert_diameter)/2 - insert_boder_spacing;
        rotate(a=insert_angle) translate([insert_x_offset, 0, 0])
            cylinder(h=insert_height, d=insert_diameter);
        rotate(a=insert_angle) translate([insert_x_offset, 0, adapter_height-insert_height])
            cylinder(h=insert_height, d=insert_diameter);
    }
}

MT-L-adapter.stl